Wang, Xingnong, Peter Felker, and Andrew H. Peterson. “Comparison of RAPD Marker Patterns To Morphological and Physiological Data In the Classification of Opuntia Accessions”. Journal of the Professional Association for Cactus Development 3 (February 15, 1998). Accessed December 19, 2025. https://www.jpacd.org/jpacd/article/view/138.