Biswas, J. K., and V. Tewari. “A Rare Case of Unruptured Tubal Ectopic Pregnancy at 14 Weeks Gestation With Live Foetus in Situ and Review of Literature”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 10, no. 1, Dec. 2020, pp. 422-4, doi:10.18203/2320-1770.ijrcog20205816.