Mattick, F. 1935: Die Gattung Purdiaea Planchon (Costaea Richard, Alloiosepalum Gilg). – Notizbl. Bot. Gart. Berlin-Dahlem 12: 395-401

Title	Die Gattung Purdiaea Planchon (Costaea Richard, Alloiosepalum Gilg)
Authorship	Mattick, F.
Date published	1935
Volume	12
In journal	Notizbl. Bot. Gart. Berlin-Dahlem
Pages	395-401