1. Contribution to the Morphology and Anatomy of Guayule (Parthenium argentatum);Artschwager,1943
2. Rules for Testing Seeds;Association of Official Seed Analysts (AOSA),2002
3. Photoperiodic induction of flowering in guayule;Backhaus;HortScience,1989
4. Seeds. Ecology, Biogeography, and Evolution of Dormancy and Germination;Bakin,1988
5. Optimum harvest maturity for guayule seed;Bedane;Ind. Crops Prod.,2006