@article{w.a.a. tjalma2006apoplexy,
  title={Abdominal apoplexy associated with the levonorgestrel intrauterine system - case report},
  author={w.a.a. tjalma},
  journal={European Journal of Gynaecological Oncology},
  volume={27},
  number={4},
  pages={429--431},
  doi = {10.12892/ejgo200604429},
  year={2006}
}