@article{h. yilksel2007and,
  title={Folate and vitamin B 12 levels in abnormal pap smears: a case control study},
  author={h. yilksel,a.r. odabasi,g. getin,m. eben,s. nergiz,e. onur},
  journal={European Journal of Gynaecological Oncology},
  volume={28},
  number={6},
  pages={526--530},
  doi = {10.12892/ejgo200706526},
  year={2007}
}