Reference

Javier Francisco-Ortega, Daniel J. Crawford, Arnoldo Santos-Guerra, Jose A. Carvalho (1996): Isozyme differentiation in the endemic genus Argyranthemum (Asteraceae: Anthemideae) in the Macaronesian Islands – Österreichische Botanische Zeitschrift = Plant Systematics and Evolution – 202: 137 - 152.