Mummigatti, K., and A. Shamshal. “Antenatal Diagnosis of Conjoined Twins - Parapagus Dicephalus A Case Report”. Nepal Journal of Obstetrics and Gynaecology, vol. 6, no. 1, Aug. 2011, pp. 61-65, https://www.nepjol.info/index.php/NJOG/article/view/5256.