Li, Jing-chao, Jian-quan Liu, and Xin-fen Gao. “A Revision of the Genus Malus Mill. (Rosaceae)”. European Journal of Taxonomy 853, no. 1 (December 28, 2022): 1–127. Accessed April 24, 2026. https://ejt.sandbox.publicknowledgeproject.org/index.php/ejt/article/view/2019.