Ochoa-Alfaro, Ana E., Claudia O. Silva-Ortega, Alicia Becerra-Flora, Joel Flores-Rivas, and Juan F. Jiménez-Bremont. 2008. “Effect of Salt Stress, Proline, and Polyamines on Seed Germination of Opuntia Streptacantha”. Journal of the Professional Association for Cactus Development 10 (July):56-70. https://doi.org/10.56890/jpacd.v10i.120.