BORREGO-ESCALANTE, F. .; MURILLO-SOTO, M. M. Growing prickly pear for Cochineal (Grana) dye production. Journal of the Professional Association for Cactus Development, [S. l.], p. 45–48, 1992. DOI: 10.56890/jpacd.vi.448. Disponível em: https://www.jpacd.org/jpacd/article/view/448. Acesso em: 19 dec. 2025.