Uhlich, H., Kreutz, C. & Rätzel, S. (2015)

A contribution to the taxonomy and phytogeography of Orobanche alba Steph. ex Willd. (Orobanchaceae)

. Phytotaxa 222 (1): 1–16. https://doi.org/10.11646/phytotaxa.222.1.1