@article{ryu_lee_choi_2016, 
  title={Development of Process for Interoperability Improvement of BIM Data for Free-form Buildings Design using the IFC Standard}, 
  volume={10}, 
  DOI={10.14257/ijseia.2016.10.2.11}, 
  publisher={Science and Engineering Research Support Society}, 
  author={Ryu and Lee and Choi}, 
  year={2016}, 
  month={Feb}
  }