@article{d. szpurek2004value,
  title={Clinical value of the ultrasound Doppler index in determination of ovarian tumor malignancy},
  author={d. szpurek,r. moszyriski,s. sajdak},
  journal={European Journal of Gynaecological Oncology},
  volume={25},
  number={4},
  pages={442--444},
  doi = {10.12892/ejgo200404442},
  year={2004}
}