Wessely and Wessely, (O. ), ?Repert. Spec. Nov. Regni Veg. 63: 311. 1960.?, 1960.

(B. ) Wessely, Wessely,, and Wessely, ?Feddes Repert. Spec. Nov. Regni. Veg. 63: 315. 1960.?, 1960.