@article{s.j. huh2007cases,
  title={Two cases of post-radiation osteosarcoma of the sacrum after pelvic irradiation for uterine cervical cancer},
  author={j.m. noh,s.j. huh},
  journal={European Journal of Gynaecological Oncology},
  volume={28},
  number={6},
  pages={497--500},
  doi = {10.12892/ejgo200706497},
  year={2007}
}