@article{a. ayhan2003and,
  title={Oncologic and reproductive outcome after fertility-saving surgery in ovarian cancer},
  author={a. ayhan,h. celik,c. taskiran,g. bozdag,t. aksu},
  journal={European Journal of Gynaecological Oncology},
  volume={24},
  number={3-4},
  pages={223--232},
  doi = {10.12892/ejgo200303223},
  year={2003}
}