Gurung, G., and A. Rana. “Diagnostic Dilemma in Cases of Ectopic Pregnancy: A Five Year Prospective Study at Tribhuvan University Teaching Hospital”. Journal of Institute of Medicine Nepal, vol. 28, no. 1, Jan. 2007, pp. 30-32, https://www.nepjol.info/index.php/JIOM/article/view/434.