@article{o. reich2011columnar,
  title={The columnar epithelium hypothesis of cervical carcinogenesis},
  author={o. reich},
  journal={European Journal of Gynaecological Oncology},
  volume={31},
  number={1},
  pages={137--138},
  doi = {10.12892/ejgo201001137},
  year={2011}
}