Doke, G., and J. Kamda. “A Study of Centchroman Users With Special Reference to Its Contraceptive Benefit”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 8, no. 11, Oct. 2019, pp. 4204-7, doi:10.18203/2320-1770.ijrcog20194594.