Shrestha, T., G. Baral, and N. Sedhain. “Sirenomelia in Dicephalic Parapagus Twins Discordant for Anencephaly and Spina Bifida”. Nepal Journal of Obstetrics and Gynaecology, vol. 15, no. 1, June 2020, pp. 81-83, https://www.nepjol.info/index.php/NJOG/article/view/29349.