1. Voluntary sterilization;ADDISON P.H.;Brit. med. J.,1969
2. VASECTOMY FOR VOLUNTARY MALE STERILISATION
3. Bilateral spontaneous re‐anastomosis of the ductus deferens;BUNGE R. S.;J. Urol. (Baltimore'),1968
4. DOUBLE VAS DEFERENS: A CASE REPORT
5. Problems in male and female sterilisation;CRAFT I.;Lancet,1972