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Published
Iris celikiii, a new species fron north-eastern Turkey
Christensen, K. I. & Akpulat, H. A., 2006, In: Nordic Journal of Botany. 24, p. 207-210
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Sakhalin-pil (Salix udensis) - endnu en smalbladet pileart i Danmark (Japanese fantail willow (Salix udensis) - another narrow-leaved willow in Denmark)
Christensen, K. I. & Nielsen, H., 2004, In: Dansk Dendrologisk Aarsskrift. 22, p. 9-15
Research output: Contribution to journal › Journal article › Research
Published
Taxonomic notes on European taxa of Crataegus (Rosaceae)
Christensen, K. I. & Janjic, N., 2006, In: Nordic Journal of Botany. 24, p. 143-147
Research output: Contribution to journal › Journal article › Research › peer-review
Published
A morphometric study of hybridization between Pinus mugo and P. sylvestris (Pinaceae)
Christensen, K. I. & Dar, G. H., 2003, In: Acta Horticulturae. 615, p. 211-221
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Vorte-fyr (Pinus attenuata) - et planteportræt (Knobcone pine (Pinus attenuata) - a plant portrait)
Christensen, K. I., 2004, In: Dansk Dendrologisk Aarsskrift. 22, p. 5-8
Research output: Contribution to journal › Journal article › Research
Published
160 botaniske stikord
Christensen, K. I., 2006, Gyldendals DVD leksikon. København: Gyldendal, 160 p.
Research output: Chapter in Book/Report/Conference proceeding › Encyclopedia chapter › Research
Published
Altai-Rødgran (Picea abies subsp. obovata i Nordskandinavien)
Christensen, K. I., 2002, In: Dansk Dendrologisk Aarsskrift. 20, p. 5-11
Research output: Contribution to journal › Journal article › Research
Published
Notes on the genus Crataegus (Rosaceae - Pyreae) in southern Europe, the Crimea and western Asia
Christensen, K. I. & Zielinski, J., 2008, In: Nordic Journal of Botany. 26, p. 344-366
Research output: Contribution to journal › Journal article › Research › peer-review
Published
A morphometric study of the geographic variation in Pinus contorta (Pinaceae)
Christensen, K. I., 2005, In: Nordic Journal of Botany. 23, p. 563-575
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Pilefamilien, Salicaceae
Christensen, K. I., 2006, Dansk flora. Frederiksen, S., Rasmussen, F. N. & Seberg, O. (eds.). København: Gyldendal, p. 372-384
Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
Published
Notes on the geographic distribution and ecology of Salix xanthicola (Salicaceae)
Christensen, K. I., Zielinski, J. & Petrova, A., 2006, In: Phytologia Balcanica. 12, p. 209-213
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Proposal to conserve the name Salix fragilis with a conserved type (Salicaceae)
Christensen, K. I. & Jonsell, B., 2005, In: Taxon. 54, 2, p. 555-556
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Salix xanthicola (Salicaceae) - distribution, ecology and relationships
Christensen, K. I., 2006, In: Annales Musei Goulandris. 11, p. 37-79
Research output: Contribution to journal › Journal article › Research
Published
Typification of specific and infraspecific names in Abies, Larix, Picea and Pinus (Pinaceae)
Christensen, K. I. & Orlova, L. V., 2006, In: Feddes Repertorium. 117, p. 519-525
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Klit-fyr /Pinus contorta i Danmark - variation og tilpasning
Christensen, K. I., 2003, In: Dansk Dendrologisk Aarsskrift. 21, p. 5-49
Research output: Contribution to journal › Journal article › Research
Published
Hvidtjørn, Crataegus L.
Christensen, K. I., 2006, Dansk flora. Frederiksen, S., Rasmussen, F. N. & Seberg, O. (eds.). København: Gyldendal, p. 416-417
Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
Published
A supplement to" K.I. Christensen & G.H. Dar 1996: A morphometric analysis of spontaneous and artificial hybrids of Pinus mugo x sylvestris (Pinaceae)"
Christensen, K., 1998, København. 2 p.
Research output: Book/Report › Book › Research
Published
Literaturbericht: Phipps, J.B., Monograph of northern Mexican Crataegus (Rosaceae subfam. Maloideae) (Sida 15)
Christensen, K., 1999, In: Bot. Jahrb. Syst.. 12, p. 141-142
Research output: Contribution to journal › Review › Research
Published
Natural hybridization among Pinus mugo and Pinus sylvestris.
Christensen, K. & Dar, G. H., 1999, International Conifer Conference 1999 23^rd-26^th August 1999, Wye College, Kent, England-Programme & Abstracts. p. 37-38 2 p.
Research output: Chapter in Book/Report/Conference proceeding › Preface/postscript › Research
Published
redwood
Christensen, K., 2000, Den Store Danske Encyklopædi. København: Gyldendal, Vol. 16. p. 1 1 p.
Research output: Chapter in Book/Report/Conference proceeding › Encyclopedia chapter › Research
Published
Review: Farjon, A. 1998. World Checklist and Bibliography of Conifers
Christensen, K., 1999, In: Nordic Journal of Botany. 19, p. 148 1 p.
Research output: Contribution to journal › Review › Research
Published
Rushforth, Keith 1999. Trees of Britain and Europe. Harper Collins Publishers. London
Christensen, K., 1999, In: Dansk Dendrologisk Aarsskrift. 17, p. 132 1 p.
Research output: Contribution to journal › Review › Research
Published
Coniferopsida
Christensen, K., 2000, Flora Nordica 1. Stockholm: Royal Swedish Academy of Sciences, p. 91-115
Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
Published
Sem-studies of epidermal patterns of petals in the angiosperms
Christensen, K. & Hansen, Hans Vilhelm, 1998, In: Opera Botanica. 135, p. 1-91
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Hybridization amongTilia cordata and T.platyphyllos (Tiliaceae) in Denmark
Christensen, K. & Wicksell, U., 1999, In: Nordic Journal of Botany. 19, p. 673-684
Research output: Contribution to journal › Journal article › Research › peer-review
Published
En endemisk Hvidtjørn fra de græske bjerge
Christensen, K., 2001, In: Dansk Dendrologisk Aarsskrift. 19, p. 5-10
Research output: Contribution to journal › Journal article › Research
Published
Salix L. (pro parte)
Christensen, K., 2000, Flora Nordica 1. Stockholm: Royal Swedish Academy of Sciences, p. 122-136,153-158,179-182
Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
Published
Materials for Flora Nordica: Typification of some Maloideae (Rosaceae) commonly cultivated in Norden
Christensen, K., 1998, In: Nordic Journal of Botany. 18, p. 701-703
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Habitat diversity and zonality of vegetation in Sind Valley, Kashmir Himalaya
Christensen, K. & Hassan Dar, G., 1999, In: Nature and Biosphere. 4, p. 49-71
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Lange, Johan 1999. Kulturplanternes indførselshistorie i Danmark indtil midten af 1900-tallet. 2. udgave. DSR Forlag. Frederiksberg
Christensen, K., 1999, In: Dansk Dendrologisk Aarsskrift. 17, p. 131
Research output: Contribution to journal › Review › Research
Published
Update of "K.I. Christensen 1998: A reanalysis of Crataegus eremitagensis C. raavadensis and schumacheri (Rosaceae)
Christensen, K., 1998, København. 2 p.
Research output: Book/Report › Book › Research
Published
Bestemmelsesnøgle til Taks (Taxus) i Danmark
Christensen, K., 1998, In: Meddelelser fra Atlas Flora Danica. 4, p. 1-2
Research output: Contribution to journal › Journal article › Research
Published
Dansk Dendrologisk Årsskrift i 50 år: Artikler publiceret i bínd 1,1 (1950) til 17 (1999)
Christensen, K., 2000, In: Dansk Dendrologisk Aarsskrift. 18, p. 50-73
Research output: Contribution to journal › Journal article › Research
Published
Crataegus L. (Rosaceae)
Christensen, K., 1998, Standardliste der Farn- und Blütenpflanzen Deutschlands. Stuttgart (Hohenheim): Ulmer, p. 158-161
Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
Museums and science centres for health: from scientific literacy to health promotion
Christensen, J. H., Bønnelycke, J., Mygind, L. & Bentsen, P., 2016, In: Museum Management and Curatorship. 31, 1, p. 17-47 31 p.
Research output: Contribution to journal › Review › Research › peer-review
Published
Activating the ‘peerness’ of youth leaders in a community sport programme through techne and phronesis
Christensen, J. H., Evans, Adam B., Klinker, C. D., Staal, M. T., Bentsen, P. & Nielsen, Glen, 2022, In: Health Promotion International. 37, 6, 11 p., daac141.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Danekræ - et nyt begreb i dansk museumslovgivning. Med engelsk oversættelse Danekræ - a new concept in Danish Museum Legislation
Christensen, E. F. & Hald, N., 1991, In: Arkæologiske Udgravninger i Danmark. 1990, p. 7-16 10 p.
Research output: Contribution to journal › Journal article › Research
Published
Cohomology of operator algebras and quantum dynamical semigroups.
Christensen, Erik & Evans , D. E., 1979, In: Journal of the London Mathematical Society. 20, 2, p. 358-368 11 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Similarities of II_1 factors with property Gamma
Christensen, Erik, 1986, In: Journal of Operator Theory. 15, 2, p. 281 - 288 8 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Perturbations of operator algebras II.
Christensen, Erik, 1977, In: Indiana University Mathematics Journal. 26, p. 891 - 904 14 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
The spatial isomorphism problem for close separable nuclear C*-algebras
Christensen, Erik, Sinclair, A. M., Smith, R. R., White, S. A. & Winter, W., 2010, In: Proceedings of the National Academy of Science of the United States of America. 107, 2, p. 587 - 591 5 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Pertrurbationer af operatoralgebraer
Christensen, Erik, 1984, 50 p.
Research output: Book/Report › Book › Research › peer-review
Published
C*-algebras nearly contained in a type I C*-algebra
Christensen, Erik, Sinclair, A. M., White, S. A. & Smith, R. R., Jan 2013, In: Canadian Journal of Mathematics. 65, p. 52-65 14 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Derivations and their relation to perturbations of operator algebras
Christensen, Erik, 1982, American Mathematical Society Symposia . Vol. 38. p. 261 - 273 13 p.
Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review
Published
Extensions of derivations II
Christensen, Erik, 1982, In: Mathematica Scandinavica. 50, p. 111 -122 12 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Dirac operators and spectral triples for some fractal sets built on curves
Christensen, Erik, Ivan, C. & Lapidus, M. L., 2008, In: Advances in Mathematics. 217, 1, p. 42 - 78 37 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Sums of two-dimensional spectral triples
Christensen, Erik & Ivan, C., 2007, In: Mathematica Scandinavica. 100, 1, p. 35-60 26 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
On non-selfadjoint representations of C*-algebras
Christensen, Erik, 1981, In: American Journal of Mathematics. 103, p. 817 - 833 17 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Non-commutative integration for monotone sequentially closed C∗ algebras
Christensen, Erik, 1972, In: Mathematica Scandinavica. 31, p. 171-190 20 p.
Research output: Contribution to journal › Journal article › Research › peer-review
Published
Konvekse mængder
Christensen, Erik, 2001, 106 p.
Research output: Book/Report › Book › Communication

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