COWAN, R.; FELKER, P. Fruit Quality of New Cold-Hardy Opuntias from Northern and High-Elevation Sites in Mexico. Journal of the Professional Association for Cactus Development, [S. l.], v. 3, 2020. DOI: 10.56890/jpacd.v3i.141. Disponível em: https://www.jpacd.org/jpacd/article/view/141. Acesso em: 16 oct. 2025.