Cony, M. A., J. C. Guevara, S. O. Trione, and O. R. Estevez. “Response to Freezing and High Temperatures of Detached Cladodes from Opuntia Species”. Journal of the Professional Association for Cactus Development, vol. 10, Jan. 2008, pp. 36-48, doi:10.56890/jpacd.v10i.118.