@article{hui an feng2019case,
  title={One case of intrauterine early pregnancy with low grade endometrial stromal sarcoma},
  author={yong xing wang,hao yan,hui an feng},
  journal={European Journal of Gynaecological Oncology},
  volume={40},
  number={4},
  pages={671--675},
  doi = {10.12892/ejgo4473.2019},
  year={2019}
}