@article{filip čečka2014to,
  title={How to distinguish between surgical and non-surgical pneumoperitoneum?},
  author={filip čečka,otakar sotona,zdenìk šubrt},
  journal={Signa Vitae},
  volume={9},
  number={1},
  pages={9--15},
  doi = {10.22514/SV91.042014.1 },
  year={2014}
}