1. Potential value of plants as sources of new anti-fertility agents;Farnsworth;J. Pharm. Sci.,1975
2. Animal models for research on contraception and fertility;Alexander,1979
3. Prospects for higher plants as a source of useful fertility regulating agents for human use;Farnsworth,1980
4. Natural products as basis for new drugs;Phillipson;Trends. Pharma. Sci.,1979
5. Las plantas medicinales de México;Martínez,1944