Bala, R., H. Kaur, and M. Nagpal. “Authenticity of Vitamin D in Modified Vaginal Health Index in Geriatric Subjects”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 5, no. 12, Dec. 2016, pp. 4119-22, doi:10.18203/2320-1770.ijrcog20164067.