Gail Reeves, Mark W. Chase, Peter Goldblatt, Paula Rudall, Michael F. Fay, Anthony V. Cox, Bernard Lejeune, Tatiana Souza-Chies,
Molecular systematics of Iridaceae: evidence from four plastid DNA regions American Journal of Botany. ,vol. 88, pp. 2074- 2087 ,(2001) ,
10.2307/3558433