@article{s. ayas2007case,
  title={A case of endodermal sinus tumor associated with the first pregnancy and successful management of the second pregnancy: a case report and review of the literature },
  author={s. ayas,i akoz,e. eskicirak,a. karateke,ö. bozoklu},
  journal={European Journal of Gynaecological Oncology},
  volume={28},
  number={2},
  pages={155--159},
  doi = {10.12892/ejgo200702155},
  year={2007}
}