Humboldt, his botanical mentor Willdenow, and the fate of the collections of Humboldt Bonpland - Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie Band 126 Heft 4 — Schweizerbart science publishers
Nomenclatural synopsis of the genus Colchicum (Colchicaceae), with some new species and combinations - Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie Band 127 Heft 2 — Schweizerbart science publishers
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