NOBEL, P. S.; LOIK, M. E. . Low-temperature tolerance of Prickly pear cacti. Journal of the Professional Association for Cactus Development, [S. l.], p. 1–9, 1993. DOI: 10.56890/jpacd.vi.458. Disponível em: https://www.jpacd.org/jpacd/article/view/458. Acesso em: 16 oct. 2025.