@inproceedings{mutlu_birbil_bülbül_yenigün_simos_psihoyios_tsitouras_anastassi_2011, 
  title={High Level Rule Modeling Language for Airline Crew Pairing}, 
  DOI={10.1063/1.3636853}, 
  publisher={AIP}, 
  author={Mutlu and Birbil and Bülbül and Yenigün and Simos and Psihoyios and Tsitouras and Anastassi}, 
  year={2011}
  }