Bursac, D, T Kulas, V Madzarac, V Kardum, A Skrtic, and Z Hrgovic. 2014. “An Unusual Prenatal Ultrasound Image of Placental Lake in High Risk Pregnancy”. Nepal Journal of Obstetrics and Gynaecology 8 (2):75-76. https://nepjol.info./index.php/NJOG/article/view/9779.