Shrestha, P., G. Baral, R. Bhansakarya, and A. N. Chaudhary. “‘Sack of marble’ Appearance in Mature Cystic Teratoma: An Unusual Finding”. Nepal Journal of Obstetrics and Gynaecology, vol. 16, no. 1, June 2021, pp. 134-6, https://nepjol.info./index.php/NJOG/article/view/37624.