| Oenothera biennis L. | Dmitrieva, S. A. & V. I. Parfenov. 1985. Kariologicheskaja kharakteristika nekotorykh vidov poleznykh rastenij flory Belorussii. Izv. Akad. Nauk Belorussk. SSR, Ser. Biol. Nauk 6: 3–8. | 84-85 | | 14 |
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| Oenothera biennis L. | Kon;akcalová, M. N., V. Jehlík & J. M;akesí;akcek. 1986. Chromosome numbers of some Oenothera species (subgenus Oenothera) from Czechoslovakia. Folia Geobot. Phytotax. 21: 163–171. | 86-87 | | 14 |
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| Oenothera biennis L. | Magulaev, A. V. 1984. Cytotaxonomic study in some flowering plants of the North Caucasus. Bot. Zhurn. SSSR 69(4): 511–517. | 84-85 | | 14 |
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| Oenothera biennis L. | Tanaka, R., K. Oginuma & S. Toko. 1988. Karyomorphological studies on 26 species in ten genera of the Onagraceae. Kromosomo 51–52: 1675–1696. | 88-89 | | 14 |
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| Oenothera biennis L. | Dmitrieva, S. A. 1986. Chisla khromosom nekotorych vidov rastenij Berezinskogo Biosfernogo Zapovednika. Zapov. Belorussii Issl. 10: 24–28. | 90-91 | | 14 |
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| Oenothera biennis L. | Dietrich, W., W. L. Wagner & P. H. Raven. 1997. Systematics of Oenothera section Oenothera subsection Oenothera (Onagraceae). Syst. Bot. Monogr. 50: 1–234. | 96-97 | R14, R12+1II, R10+2II | |
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| Oenothera biennis L. | Mĕsíček, J. 1992. In J. M|3esí|3ccek & V. Jav@0urková-Jarolímová, List of Chromosome Numbers of the Czech Vascular Plants. Academia, Praha. | 96-97 | | 14 |
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| Oenothera biennis L. | Dobea, C., M. Kiehn & E. Vitek. 1996. Beiträge zur Gefässpflanzen-Flora von Österreich: Chromosomenzählungen III. Verh. Zool.-Bot. Ges. Wien 133: 301–318. | 98-00 | | 14 |
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| Oenothera biennis L. | Albers, F. & W. Pröbsting. 1998. In R. Wisskirchen & H. Haeupler, Standardliste der Farn- und Blütenpflanzen Deutschlands. Bundesamt für Naturschutz & Verlag Eugen Ulmer, Stuttgart. | 98-00 | | 14 |
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