Paterson, A.H. and Richardson , C. 1996. Toward a Cactus Genome Project: Utilizing Information from Wll-Studied Model Plants to Map the Opuntia Chromosomes. Journal of the Professional Association for Cactus Development. 1, (Jan. 1996), 106–109. DOI:https://doi.org/10.56890/jpacd.v1i.210.