Valdez-Cepeda, Ricardo David, Fidel Blanco-Macías, Clemente Gallegos-Vázquez, Gilberto E. Salinas-García, and Rigoberto E. Vázquez-Alvarado. “Freezing Tolerance of Opuntia Spp”. Journal of the Professional Association for Cactus Development 4 (May 10, 2001): 105–116. Accessed January 2, 2026. https://jpacd.org/jpacd/article/view/133.