Gallegos–Vásquez, C., Barrientos–Priego, A.F., Reyes–Agüero, J.A., Núñez–Colín, C.A. and Mondragón–Jacobo, C. 2011. Clusters of commercial varieties of cactus pear and xoconostle using UPOV morphological traits. Journal of the Professional Association for Cactus Development. 13, (Jan. 2011), 10–22. DOI:https://doi.org/10.56890/jpacd.v13i.85.