Reference:Zohary1983a
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Verbatim text: Zohary, M. 1983. The genus Nigella (Ranunculaceae)--A taxonomic revision. Pl. Syst. Evol. 142: 71-107.
Author: Zohary, M.
Year: 1983
Title: The genus Nigella (Ranunculaceae)--A taxonomic revision
Journal: Pl. Syst. Evol
Volume: 142
Pages: 71–107