Arroyo-Cosultchi, Gabriel, Teresa Terrazas, Salvador Arias, and Lauro López-Mata. “Seed Morphology in Neobuxbaumia (Cactaceae)”. Botanical Sciences0, no. 81 (December 15, 2007): 17 - 25. Accessed March 28, 2024. https://botanicalsciences.com.mx/index.php/botanicalSciences/article/view/1762.