Felker, P., Zapata, R., Wang, X., Medina, D., Bunch, R. y Paterson, A. 2009. Fruit characters among apomicts and sexual progeny of a cross of the Texas native Opuntia lindheimerii (1250) with a commercial fruit type Opuntia ficus–indica (1281). Journal of the Professional Association for Cactus Development. 12, (dic. 2009), 48–66. DOI:https://doi.org/10.56890/jpacd.v12i.97.