Martínez-Azorín, M.; Pinter, M.; Crespo, M. B.; Slade, J.; Deutsch, G.; Wetschnig, W.

Clarification of Massonia echinata and Some Other Frequently Misunderstood Massonia Species (Asparagaceae, Scilloideae), With the Description of M. pseudoechinata and M. roggeveldensis

. Phytotaxa 2015, 239, 101–129.