Liewluck, T. ., P. . Wongpathumtip, T. . Chuangsuwanich, and P. Charoenpanich. “Primary Peripheral Primitive Neuroectodermal Tumor of the Ovary With an Epithelial Cyst : A Case Report and Review of Literature”. Siriraj Medical Journal, vol. 55, no. 7, July 2003, pp. 425-37, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245434.