@article{w. a. a. tjalma2003mixed,
  title={Malignant mixed mtillerian tumor of the ovary and false negative punctures},
  author={p. cryns,n. j. l. roofthooft,w. a. a. tjalma},
  journal={European Journal of Gynaecological Oncology},
  volume={24},
  number={1},
  pages={70--72},
  doi = {10.12892/ejgo20030170},
  year={2003}
}