Lewis, P. F., A. P. Rudrakar, N. B. Bavdekar, and N. B. Singh. “Unruptured Tubal Ectopic Pregnancy: Analysis and Management”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 11, no. 8, July 2022, pp. 2132-6, doi:10.18203/2320-1770.ijrcog20221924.