@article{h.w. nijman2004is,
  title={What is the number of lymph nodes required for an "adequate" pelvic lymphadenectomy? },
  author={h.w. nijman,m. khalifa,a. covens},
  journal={European Journal of Gynaecological Oncology},
  volume={25},
  number={1},
  pages={87--89},
  doi = {10.12892/ejgo20040187},
  year={2004}
}