@article{h. ozan2008case,
  title={A case with three primary tumors of the ovary, endometrium and gallbladder},
  author={h. ozan,k. özerkan,s. aker,m. bülbül},
  journal={European Journal of Gynaecological Oncology},
  volume={29},
  number={5},
  pages={551--553},
  doi = {10.12892/ejgo200805551},
  year={2008}
}