Gautam, P., D. Gupta, A. Khan, P. B. Singh, and V. Srivastava. “Osseous Metaplasia of the Endometrium – an Unusual Etiology of Secondary Infertility in a Nulliparous Woman”. International Journal of Research in Medical Sciences, vol. 14, no. 10, Sept. 2026, pp. 4857-9, doi:10.18203/2320-6012.ijrms20263568.