@article{petry ku2009cervical,
  title={Primary cervical cancer truly negative for
high-risk human papillomavirus is a rare but distinct entity that can affect
virgins and young adolescents},
  author={liebrich c,brummer o,von wasielewski r,wegener g,meijer c  ,iftner t,petry ku},
  journal={European Journal of Gynaecological Oncology},
  volume={30},
  number={1},
  pages={45--48},
  doi = {10.12892/ejgo20090145},
  year={2009}
}