Research areas

  1. Published

    Proposal to amend the International Code of Botanical Nomenclature: Proposal to replace Art. 42.2 with new Art. 42.2 and Art. 42.3. / Friis, Ib.

    In: Taxon, Vol. 35, 1986, p. 400-403.

    Research output: Contribution to journalJournal articleResearchpeer-review

  2. Published

    Rafinesque's Valentiana volubilis, and the early botanical collections from Ethiopia. / Friis, Ib.

    In: Taxon, Vol. 35, 1986, p. 358-361.

    Research output: Contribution to journalJournal articleResearchpeer-review

  3. Published

    The botanical identity of Mimusops in ancient Egyptian tombs. / Friis, Ib; Hepper, F. Nigel; Gasson, Peter.

    In: Journal of Egyptian Archaeology, Vol. 72, 1986, p. 201-204.

    Research output: Contribution to journalJournal articleResearchpeer-review

  4. Published

    The forest vegetation of Ethiopia. / Friis, Ib.

    In: Symbolae Botanicae Uppsaliensis, Vol. 26, 1986, p. 31-47.

    Research output: Contribution to journalJournal articleResearchpeer-review

  5. Published

    The genus Urera Gaud. (Urticaceae) in eastern tropical Africa. / Friis, Ib.

    In: Nordic Journal of Botany, Vol. 5, 1986, p. 547-553.

    Research output: Contribution to journalJournal articleResearchpeer-review

  6. Published

    The typification and identity of three species of Parietaria L. (Urticaceae), ostensibly described from South Africa. / Friis, Ib.

    In: Taxon, Vol. 35, 1986, p. 701-705.

    Research output: Contribution to journalJournal articleResearchpeer-review

  7. Published

    Two new taxa and a new combination in Urticaceae for the Flora Zambesiaca. / Friis, Ib.

    In: Boletim da Sociedade Broteriana, Sér. 2, Vol. 58, 1986, p. 201-214.

    Research output: Contribution to journalJournal articleResearchpeer-review

  8. Published

    Variation in Macaranga capensis (Euphorbiaceae). / Friis, Ib; Gilbert, Michael G.

    In: Kew Bulletin, 1986, p. 68-68.

    Research output: Contribution to journalJournal articleResearchpeer-review

  9. Published

    Zonation of Forest Vegetation on the South Slope of Bale Mountains, South Ethiopia. / Friis, Ib.

    In: SINET- An Ethiopian Journal of Science., No. 9 (suppl:Proc of 2nd Int Symp, Flora Eth, 1986, p. 29-44.

    Research output: Contribution to journalJournal articleResearch

  10. Published

    Concurrent solution of the stereo correspondence problem and the surface reconstruction problem. / Olsen, Søren Ingvor.

    Proceedings of the 8th International Conference on Pattern Recognition, CVPR. Paris, 1986. p. 1038-1040.

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

  11. Published

    Garcinia buxifolia Chiov. is Buxus hildebrandtii Baill. (Buxaceae). / Friis, Ib.

    In: Nordic Journal of Botany, Vol. 4, 1985, p. 747-748.

    Research output: Contribution to journalJournal articleResearchpeer-review

  12. Published

    Notes on the Somalian species of Ficus (Moraceae). / Friis, Ib.

    In: Nordic Journal of Botany, Vol. 5, 1985, p. 331-333.

    Research output: Contribution to journalJournal articleResearchpeer-review

  13. Published

    The identity of Hypseloderma jubense (Sapindaceae). / Friis, Ib; Vollesen, Kaj.

    In: Kew Bulletin, Vol. 40, 1985, p. 859-861.

    Research output: Contribution to journalJournal articleResearchpeer-review

  14. Published

    The identity of E. Chiovenda's Somalian Sapotaceae. / Friis, Ib.

    In: Kew Bulletin, Vol. 40, 1985, p. 395-398.

    Research output: Contribution to journalJournal articleResearchpeer-review

  15. Published

    Orchids. / Rasmussen, Finn N.

    The families of the Monocotyledons. ed. / Rolf Dahlgren; H. Trevor Clifford; Peter F. Yeo. Berlin, 1985. p. 249-274.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  16. Published

    Sciaplea Rauschert (1982) is a synonym of Dialium L. (1767). / Friis, Ib.

    In: Taxon, Vol. 33, 1984, p. 505-506.

    Research output: Contribution to journalJournal articleResearchpeer-review

  17. Published

    A new arborescent species of Croton (Euphorbiaceae) from the semi evergreen forests of S Somalia and E Kenya. / Friis, Ib; Gilbert, Michael G.

    In: Nordic Journal of Botany, Vol. 4, 1984, p. 327-331.

    Research output: Contribution to journalJournal articleResearchpeer-review

  18. Published

    A synopsis of the genus Pouzolzia Gaud. (Urticaceae) in tropical Africa. / Friis, Ib; Jellis, Sally.

    In: Kew Bulletin, Vol. 39, 1984, p. 587-601.

    Research output: Contribution to journalJournal articleResearchpeer-review

  19. Published

    Additional notes on Somalian Sapindaceae. / Friis, Ib.

    In: Kew Bulletin, Vol. 39, 1984, p. 779-783.

    Research output: Contribution to journalJournal articleResearchpeer-review

  20. Published

    Additions to the Flora of Ethiopia. / Friis, Ib; Vollesen, Kaj.

    In: Willdenowia, Vol. 14, 1984, p. 355-371.

    Research output: Contribution to journalJournal articleResearchpeer-review

  21. Published

    An analysis of the protologues of new genera with new species in Forsskål's Flora Aegyptiaco-Arabica. / Friis, Ib.

    In: Taxon, Vol. 33, 1984, p. 655-667.

    Research output: Contribution to journalJournal articleResearchpeer-review

  22. Published

    Proposal to conserve 1648 Graphorkis Du Petit-Thouars (1804 - Orchidaceae) with a conserved type. / Friis, Ib; Rasmussen, Finn N.

    In: Taxon, Vol. 33, 1984, p. 114-116.

    Research output: Contribution to journalJournal articleResearchpeer-review

  23. Published

    Studies in tropical African Urticaceae and Moraceae. / Friis, Ib.

    Uppsala, Sverige : Anacapri, 1984. 40 p. (Acta Universitatis Uppsaliensis, Vol. 761.).

    Research output: Book/ReportDoctoral thesis

  24. Published

    The spelling of Pehr Forsskål's family name. / Friis, Ib; Thulin, Mats.

    In: Taxon, Vol. 33, 1984, p. 668-672.

    Research output: Contribution to journalJournal articleResearchpeer-review

  25. Published

    Validation of names of new species by reference to previously published descriptions of new genera without valid species names. / Friis, Ib.

    In: Taxon, Vol. 33, 1984, p. 301-308.

    Research output: Contribution to journalJournal articleResearchpeer-review

  26. Published

    Validity of names published by Forsskål and Aublet. / Friis, Ib; Brummitt, Richard K.; Hepper, F. Nigel; Jeffrey, Charles; Taylor, Nigel P.; Verdcourt, Bernard; Howard, Richard A.; Nicolson, Dan H.

    In: Taxon, Vol. 33, 1984, p. 495-496.

    Research output: Contribution to journalJournal articleResearchpeer-review

  27. Published

    High-field 3He-F interaction at the surface of fluorocarbon spheres. / Schuhl, A.; Chapellier, M.; Rasmussen, Finn Berg.

    In: Journal of Low Temperature Physics, Vol. 57, No. 5-6, 01.12.1984, p. 483-499.

    Research output: Contribution to journalJournal articleResearchpeer-review

  28. Published

    A synopsis of the genus Obetia (Urticaceae). / Friis, Ib.

    In: Kew Bulletin, Vol. 38, 1983, p. 221-228.

    Research output: Contribution to journalJournal articleResearchpeer-review

  29. Published

    Myriader af liv [regnskoven]. / Friis, Ib.

    In: Levende Natur - Tidsskrift for international naturbevarelse, Vol. 3, 1983, p. 3-7.

    Research output: Contribution to journalJournal articleCommunication

  30. Published

    Note on the botanical collections of Pehr Forsskål. / Friis, Ib.

    In: Kew Bulletin, Vol. 38, 1983, p. 457-467.

    Research output: Contribution to journalJournal articleResearchpeer-review

  31. Published

    Phytogeography of the tropical north-East African mountains (Ethiopia, Djibouti, Somalia). / Friis, Ib.

    In: Bothalia, Vol. 14, 1983, p. 525-532.

    Research output: Contribution to journalJournal articleResearchpeer-review

  32. Published

    The acaulescent and succulent species of Dorstenia sect. Kosaria (Moraceae) from NE tropical Africa and Arabia. / Friis, Ib.

    In: Nordic Journal of Botany, Vol. 3, 1983, p. 533-538.

    Research output: Contribution to journalJournal articleResearchpeer-review

  33. Published

    Name changes for well known species of Boehmeria (Urticaceae). / Friis, Ib; Marais, Wessel.

    In: Kew Bulletin, Vol. 37, 1982, p. 163-163.

    Research output: Contribution to journalJournal articleResearchpeer-review

  34. Published

    New taxa from the Imatong Mountains, S. Sudan. / Friis, Ib; Vollesen, Kaj.

    In: Kew Bulletin, Vol. 38, 1982, p. 221-228.

    Research output: Contribution to journalJournal articleResearchpeer-review

  35. Published

    Studies in the flora and vegetation of SW Ethiopia. / Friis, Ib; Rasmussen, Finn N.; Vollesen, Kaj.

    In: Opera Botanica, Vol. 63, 1982, p. 1-70.

    Research output: Contribution to journalJournal articleResearchpeer-review

  36. Published

    The identity of Rumicicarpus ramosissimus Chiov. (Tiliaceae). / Friis, Ib.

    In: Nordic Journal of Botany, Vol. 2, 1982, p. 111-113.

    Research output: Contribution to journalJournal articleResearchpeer-review

  37. Published

    The identity of Urera longifolia and U. oligoloba, a supplement to Chew's monograph of Laportea (Urticaceae). / Friis, Ib.

    In: Nordic Journal of Botany, Vol. 2, 1982, p. 231-233.

    Research output: Contribution to journalJournal articleResearchpeer-review

  38. Published

    The typification of Forsskaolea viridis Ehrenb. ex Webb (Urticaceae). / Friis, Ib.

    In: Taxon, Vol. 31, 1982, p. 727-729.

    Research output: Contribution to journalJournal articleResearchpeer-review

  39. Published

    Fluctuation-induced first-order nuclear magnetic transition in solid 3He. / Bak, Per; Rasmussen, Finn Berg.

    In: Physical Review B. Condensed Matter and Materials Physics, Vol. 23, No. 9, 19.05.1981, p. 4538-4540.

    Research output: Contribution to journalJournal articleResearchpeer-review

  40. Published

    What causes the first-order magnetic transition in solid 3He. / Bak, Per; Rasmussen, Finn Berg.

    In: Physica B: Condensed Matter, Vol. 108, No. 1-3, 01.09.1981, p. 849-51.

    Research output: Contribution to journalJournal articleResearchpeer-review

  41. Published

    Zero-pressure organic superconductor : Di- (Tetramethyltetraselenafulvalenium)-perchlorate [(TMTSF)2ClO4]. / Bechgaard, K.; Carneiro, K.; Olsen, M.; Jacobsen, C.S.; Rasmussen, Finn Berg.

    In: Physical Review Letters, Vol. 46, No. 13, 30.03.1981, p. 852-855.

    Research output: Contribution to journalJournal articleResearchpeer-review

  42. Published

    Superconductivity in (TMTSF)2 ClO4 at zero pressure. / Bechgaard, Klaus; Carneiro, K.; Jacobsen, C.S.; Olsen, M.; Rasmussen, F.B.; Rindorf, G.

    In: J. Molecul. Crystals and Liquid Crystals, Vol. 79, 01.02.1981, p. 271-275.

    Research output: Contribution to journalJournal articleResearchpeer-review

  43. Published

    Experiment on the melting pressure of spin polarized He3. / Chapellier, M.; Olsen, M.; Rasmussen, Finn Berg.

    In: Physica B: Condensed Matter, Vol. 107, No. 1-3, 01.08.1981, p. 31-32.

    Research output: Contribution to journalJournal articleResearch

  44. Published

    A note on effective publication. / Friis, Ib; Dahlgren, Rolf.

    In: Taxon, Vol. 30, 1981, p. 499-501.

    Research output: Contribution to journalJournal articleResearchpeer-review

  45. Published

    A synopsis of the genus Girardinia Gaud. (Urticaceae). / Friis, Ib.

    In: Kew Bulletin, Vol. 36, 1981, p. 143-157.

    Research output: Contribution to journalJournal articleResearchpeer-review

  46. Published

    Notes on Somalian Sapindaceae. / Friis, Ib.

    In: Kew Bulletin, Vol. 36, 1981, p. 139-141.

    Research output: Contribution to journalJournal articleResearchpeer-review

  47. Published

    The taxonomy and distribution of Mimusops laurifolia (Sapotaceae). / Friis, Ib.

    In: Kew Bulletin, Vol. 35, 1981, p. 785-792.

    Research output: Contribution to journalJournal articleResearchpeer-review

  48. Published

    Proposal to conserve the generic name Hagenia J. F. Gmel. over Bankesia Bruce (Rosaceae). / Friis, Ib; Hepper, F. Nigel; Jansen, P.C.M.

    In: Taxon, Vol. 29, 1980, p. 511-512.

    Research output: Contribution to journalJournal articleResearchpeer-review

  49. Published

    The authority and date of publication of the genus Casuarina (Casuarinaceae) and its type species. / Friis, Ib.

    In: Taxon, Vol. 29, 1980, p. 511-512.

    Research output: Contribution to journalJournal articleResearchpeer-review

  50. Published

    The identity of the Ethiopian monotypic genus Tzellemtinia Chiov. / Friis, Ib; Vollesen, Kaj.

    In: Botaniska Notiser, Vol. 133, 1980, p. 347-349.

    Research output: Contribution to journalJournal articleResearch

  51. Published

    Production of highly polarized solid 3He in a Pomeranchuk cell. / Rasmussen, Finn Berg.

    In: Journal de Physique. Colloques, Vol. 41, No. C7, 01.07.1980, p. C7: 89-94.

    Research output: Contribution to journalJournal articleResearchpeer-review

  52. Published

    Spin polarization of liquid 3He by rapid melting of polarized solid. / Chapellier, M.; Frossati, G.; Rasmussen, Finn Berg.

    In: Physical Review Letters, Vol. 42, 20.05.1979, p. 904-907.

    Research output: Contribution to journalJournal articleResearchpeer-review

  53. Published

    Dombeya torrida, the correct name for James Bruce's "Walkuffa" / Friis, Ib; Hepper, F. Nigel.

    In: Botaniska Notiser, Vol. 132, 1979, p. 397-398.

    Research output: Contribution to journalJournal articleResearch

  54. Published

    The wild populations of Coffea arabica L. and the cultivated coffee. / Friis, Ib.

    Taxonomic Aspects of African Economic Botany: Proceedings of the IXth Plenary Meeting of AETFAT.. ed. / G. Kunkel. Las Palmas de Gran Canaria., 1979. p. 63-68.

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearch

  55. Published

    East African bryophytes IV. Danish collections. / Bizot, M.; Friis, Ib; Lewinsky, Jette; Thamas, Pócs.

    In: Lindbergia, Vol. 4, 1978, p. 259-284.

    Research output: Contribution to journalJournal articleResearchpeer-review

  56. Published

    A reconsideration of the genera Monotheca and Spiniluma (Sapotaceae). / Friis, Ib.

    In: Kew Bulletin, Vol. 33, 1978, p. 91-98.

    Research output: Contribution to journalJournal articleResearchpeer-review

  57. Published

    Properties of melting  3He : specific heat, entropy, latent heat and temperature. / Halperin, W.P.; Rasmussen, Finn Berg; Archie, C.N.; Richardson, R.C.

    In: Journal of Low Temperature Physics, Vol. 31, 1978, p. 617.

    Research output: Contribution to journalJournal articleResearchpeer-review

  58. Published

    Pelargonium boranense sp. nov. (Geraniaceae). / Friis, Ib; Gilbert, Michael G.

    In: Flowering Plants of Africa, Vol. 43, 1976, p. Tab. 1705 + 4 pp. text.

    Research output: Contribution to journalJournal articleResearchpeer-review

  59. Published

    Omkring en berømt dansk botaniker i Indien [Nathanael Wallich]. / Friis, Ib; Hamann, Ole Jørgen.

    In: Naturens Verden, Vol. 1976, No. 12, 1976, p. 393-408.

    Research output: Contribution to journalJournal articleCommunication

  60. Published

    Progress made in the botanical exploration of Africa: Ethiopia. / Friis, Ib.

    In: Boissiera, Vol. 24, 1976, p. 599-599.

    Research output: Contribution to journalJournal articleResearch

  61. Published

    Studies in the genus Haemanthus (Amaryllidaceae) IV. Division of the genus into Haemanthus s. str. and Scadoxus, with notes on Haemanthus s. str. / Friis, Ib; Nordal, Inger.

    In: Norwegian Journal of Botany, Vol. 23, 1976, p. 63-77.

    Research output: Contribution to journalJournal articleResearchpeer-review

  62. Published

    Specific heat of normal and superfluid 3He on the melting curve. / Halperin, W.P.; Archie, C.N.; Rasmussen, Finn Berg; Alvesalo, Tapio ; Richardson, R.C.

    In: Physical Review B. Condensed Matter and Materials Physics, Vol. 13, 01.03.1976, p. 2124-2131.

    Research output: Contribution to journalJournal articleResearchpeer-review

  63. Published

    Linociera giordanoi (Oleaceae) - the correct name for a widespread African species. / Friis, Ib.

    In: Kew Bulletin, Vol. 30, 1975, p. 16-16.

    Research output: Contribution to journalJournal articleResearchpeer-review

  64. Published

    The giant species of Cirsium (Asteraceae) in S Ethiopia. / Friis, Ib.

    In: Norwegian Journal of Botany, Vol. 22, 1975, p. 201 - 207.

    Research output: Contribution to journalJournal articleResearchpeer-review

  65. Published

    The two alternative systems of nomenclature proposed and used for orchids by Du Petit-Thouars. / Friis, Ib; Rasmussen, Finn N.

    In: Taxon, Vol. 24, 1975, p. 307-318.

    Research output: Contribution to journalJournal articleResearchpeer-review

  66. Published

    Thermodynamic temperature scale derived from measurements of 3He latent heat. / Rasmussen, Finn Berg; Halperin, W.P.; Archie, C.N.; Richardson, R.C.

    In: Physical Review Letters, Vol. 34, No. 12, 24.03.1975, p. 718-721.

    Research output: Contribution to journalJournal articleResearchpeer-review

  67. Published

    Dorstenia soerensenii sp. nov. (Moraceae) from SW Ethiopia, and related species. / Friis, Ib.

    In: Norwegian Journal of Botany, Vol. 21, 1974, p. 101-110.

    Research output: Contribution to journalJournal articleResearchpeer-review

  68. Published

    Studies in the genus Haemanthus (Amaryllidaceae) III. A revision of the sections Gyaxis and Nerissa. / Friis, Ib; Bjørnstad, Inger.

    In: Norwegian Journal of Botany, Vol. 21, 1974, p. 243-275.

    Research output: Contribution to journalJournal articleResearchpeer-review

  69. Published

    Observation of nuclear magnetic order in solid 3He. / Halperin, W.P.; Archie, C.N.; Rasmussen, Finn Berg; Buhrman, R.A.; Richardson, R.C.

    In: Physical Review Letters, Vol. 32, No. 17, 01.01.1974, p. 927-930.

    Research output: Contribution to journalJournal articleResearchpeer-review

  70. Published

    Studies in the genus Haemanthus (Amaryllidaceae) I. The infrageneric taxonomy. / Friis, Ib; Bjørnstad, Inger.

    In: Norwegian Journal of Botany, Vol. 19, 1972, p. 187-206.

    Research output: Contribution to journalJournal articleResearchpeer-review

  71. Published

    Studies in the genus Haemanthus (Amaryllidaceae) II. A revision of the section Demeusea (De Wild. & Th. Dur.) Pax & Hoffm. emend Bjørnst. & Friis. / Friis, Ib; Bjørnstad, Inger.

    In: Norwegian Journal of Botany, Vol. 19, 1972, p. 207 — 222.

    Research output: Contribution to journalJournal articleResearchpeer-review

  72. Published

    Hall effect in the normal and flux-flow states of some indium alloys. / Byrnak, B. ; Rasmussen, Finn Berg.

    In: Physica B: Condensed Matter, Vol. 55, 01.10.1971, p. 357-361.

    Research output: Contribution to journalJournal articleResearchpeer-review

  73. Published

    A new species of Guizotia (Compositae) from NE tropical Africa. / Friis, Ib.

    In: Norwegian Journal of Botany, Vol. 18, 1971, p. 231-234.

    Research output: Contribution to journalJournal articleResearchpeer-review

  74. Published

    A new species of Haemanthus (Amaryllidaceae) from SW Ethiopia. / Friis, Ib; Bjørnstad, Inger.

    In: Norwegian Journal of Botany, Vol. 18, 1971, p. 227-230.

    Research output: Contribution to journalJournal articleResearchpeer-review

  75. Published

    A revision of the Stachys aculeolatus group (Labiateae) in tropical Africa. / Friis, Ib; Bjørnstad, Inger; Thulin, Mats.

    In: Norwegian Journal of Botany, Vol. 18, 1971, p. 121-138.

    Research output: Contribution to journalJournal articleResearchpeer-review

  76. Published

    Oversigt over Botanisk Haves Plantesamling. / Friis, Ib; Edlefsen, Leif Blohm.

    Københavns Universitets Fond til tilvejebringelse af læremidler, 1970. 101 p.

    Research output: Book/ReportBook

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