@article{g.q. ding2012retroperitoneal,
  title={Primary retroperitoneal mucinous cystadenoma adjacent to the kidney: report of two cases and review},
  author={s. cheng,y. chen,xxx,l. xu,z. zhang,g.q. ding},
  journal={European Journal of Gynaecological Oncology},
  volume={33},
  number={3},
  pages={334--336},
  doi = {10.12892/ejgo201203334},
  year={2012}
}