Loza-Cornejo, S., López-Mata, L. and Terrazas, T. 2008. Morphological Seed Traits and Germination of Six Species of Pachycereeae (Cactaceae). Journal of the Professional Association for Cactus Development. 10, (Jul. 2008), 71–84. DOI:https://doi.org/10.56890/jpacd.v10i.121.