Al-Riyami, Nihal, Rahma Al-Hadabi, Tamima Al-Dughaishi, and Marwa Al-Riyami. 2013. “Placental Tumour : What Could It Be?”. Sultan Qaboos University Medical Journal 13 (3):459-62. https://journals.squ.edu.om/index.php/squmj/article/view/1850.