G. Goyal, K. Tongaria, S. Kumar, B. K. Thakran, and M. Yadav, “Maternal and perinatal morbidity and mortality in COVID-19 positive obstetric patients with medical disorders in tertiary care hospital in North India”, Int J Reprod Contracept Obstet Gynecol, vol. 10, no. 9, pp. 3478–3485, Aug. 2021.