Budhathoki, B., P. Sharma, N. Dhakal, and R. Sah. “An Unusual Case of a Forgotten Intrauterine Contraceptive Device for 25 Years Presented With Ectopic Pregnancy at AMDA Hospital, Damak, Nepal”. Birat Journal of Health Sciences, vol. 2, no. 1, May 2017, pp. 142-4, doi:10.3126/bjhs.v2i1.17294.