1. Paternity by a seemingly infertile vasectomised man;Thomson, J.A.; Lincoln, P.J.; Mortimer, P.;BMJ,1993
2. Sperm motility;Amelar, R.D.; Dubin, L.; Schoenfeld, C.,1980
3. Transient reappearance of sperm after vasectomy;Marshall, S.; Lyon, R.P.;JAMA,1972
4. How should one evaluate a man whose wife becomes pregnant after he has had an apparently successful vasectomy?;Bernstein, G.S.;Ferity Review,1979
5. Earlier testing after vasectomy, based on the absence of motile sperm;Edwards, I.S.;FertilSteril,1993