1. Introduce a modified vasectomy technique—“clamp method”;The Surgical Dept. of No. 1 Worker's Hospital of Chongqing;Urol Communication,1965
2. Vas ligation with clamp method under direct vision;Li;Chin Med J.,1976
3. Vas ligation by injection needle fixation method;Yang,1985
4. Vas ligation by incision with injection needle;Zhu,1985
5. Simple vasoligation without section;Huang;Reprod Contracept,1982