Vázquez-Vázquez, Cirilo, Rafael Zúñiga-Tarango, Ignacio Orona-Castillo, Bernardo Murillo-Amador, Enrique Salazar-Sosa, Rigoberto Vázquez-Alvarado, José Luis García-Hernández, and Enrique Troyo-Diéguez. “Root Growth Rate Analysis in Four Opuntia Ficus-Indica (L.) Mill. Varieties”. Journal of the Professional Association for Cactus Development 9 (October 6, 2007): 82–90. Accessed October 22, 2025. https://jpacd.org/jpacd/article/view/268.