AL-SHEHBAZ, I. A. “New Combinations in Brassicaceae (Cruciferae): Draba Serpens Is a Hemilophia and D. Williamsii Is a Lepidostemon”. Edinburgh Journal of Botany 59, no. 3 (November 14, 2002): 443–446. Accessed September 3, 2026. https://journals.rbge.org.uk/ejb/article/view/1253.