Chavez-Ramirez, Felipe, Xingong Wang, Ken Jones, David Hewitt, and Peter Felker. 1997. “Ecological Characterization of Opuntia Clones in South Texas: Implications for Wildlife Herbivory and Frugivory”. Journal of the Professional Association for Cactus Development 2 (January):9-19. https://doi.org/10.56890/jpacd.v2i.172.