Ratnasuriya, W.D.Jayawardena, K.G.I.Premakumara, G.A.S.2010-07-062010-07-061990Journal of the National Science Council of Sri Lanka, 18(1):p.53-60https://dl.nsf.gov.lk/handle/1/6515Contraceptive agentsPlantsPiper beteleMedical SciencesAntimortility effects of Piper betele (L.) leaf extract on washed human spermatozoaArticle