Liewluck, Teerin, Praphatsorn Wongpathumtip, Tuenjai Chuangsuwanich, and Pichai Charoenpanich. 2003. “Primary Peripheral Primitive Neuroectodermal Tumor of the Ovary With an Epithelial Cyst : A Case Report and Review of Literature”. Siriraj Medical Journal 55 (7):425-37. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245434.