@article{r. x. guo2013of,
  title={Effects of loop electrosurgical excision procedure
or cold knife conization on pregnancy outcomes},
  author={h. j. guo,r. x. guo,y. l. liu},
  journal={European Journal of Gynaecological Oncology},
  volume={34},
  number={1},
  pages={79--82},
  doi = {10.12892/ejgo340115},
  year={2013}
}