C. Shivananjaiah, A. N. U., K. R. Swaminathan, A. Swarup, S. Pocha, and D. S. Pathadan, “Ectopic pregnancy in a tertiary care center: a retrospective study”, Int J Reprod Contracept Obstet Gynecol, vol. 5, no. 4, pp. 962–964, Dec. 2016.