Bhandari, G., K. Yadav, and R. Shah. “Ectopic Pregnancy and Its Risk Factors: A Case Control Study in Nepalese Women”. Journal of BP Koirala Institute of Health Sciences, vol. 1, no. 2, Dec. 2018, pp. 30-34, doi:10.3126/jbpkihs.v1i2.22075.