1. The study on animal for injection of vas deferens for sterilization;Li;Chongqing Med J,1973
2. A study of sterilization by vas deferens occlusion, a follow-up study for 7 years;Li;Reprod Contraception,1980
3. Review of new methods of vas occlusion;Lee;J Human Sci,1985
4. Transcutaneous sterilization;Goldsmith,1985
5. Cadmium and other mineral elements;Gunn,1970