@article{şahin_2012, 
  title={Patellofemoral problems in childhood and adolescence}, 
  volume={11}, 
  DOI={10.5606/totbid.dergisi.2012.53}, 
  publisher={Baycinar Tibbi Yayincilik}, 
  author={Şahin}, 
  year={2012}, 
  month={Nov}
  }