Kosterin, O. E. “Abyssnian Pea (Lathyrus Schaeferi Kosterin Pro Pisum Abyssinicum A. Br.) – a Problematic Taxon”. Acta Biologica Sibirica 3, no. 3 (December 20, 2017): 97-110. Accessed September 24, 2021. http://journal.asu.ru/biol/article/view/3621.