BARRIENTOS PEREZ, F. .; BORREGO-ESCALANTE, F. .; FELKER, P. Collaborative Mexico/United States initiative to breed freeze tolerant fruit and forage Opuntia varieties. Journal of the Professional Association for Cactus Development, [S. l.], p. 49–55, 1992. DOI: 10.56890/jpacd.vi.450. Disponível em: https://www.jpacd.org/jpacd/article/view/450. Acesso em: 16 oct. 2025.