KAY, W. H. .; KAY, A. J. . The economic feasibility of cultivating prickly pear as a crop for feeding cattle in south Texas. Journal of the Professional Association for Cactus Development, [S. l.], p. 29–32, 1990. DOI: 10.56890/jpacd.vi.391. Disponível em: https://www.jpacd.org/jpacd/article/view/391. Acesso em: 16 oct. 2025.