Singh, S. P., D. Mangla, J. Chawan, and A. Ul Haq. “Asymptomatic Presentation of Silent Uterine Perforation by Cu-T 380A: A Case Report With Review of Literature”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 3, no. 4, Feb. 2017, pp. 1157-9, https://www.ijrcog.org/index.php/ijrcog/article/view/2248.