Simple rectilinear polygons are perfect under rectangular vision. Arkin, E., Biro, M., Filtser, O., Katz, M. J, Mitchell, J. S., & Schmidt, C. In Proceedings of the 23rd Fall Workshop on Computational Geometry (FWCG 2013), 2013.
Simple rectilinear polygons are perfect under rectangular vision [link]Paper  bibtex   
@inproceedings{arkin2013simple,
  title={Simple rectilinear polygons are perfect under rectangular vision},
  author={Arkin, Esther and Biro, Michael and Filtser, Omrit and Katz, Matthew J and Mitchell, Joseph SB and Schmidt, Christiane},
  booktitle={Proceedings of the 23rd Fall Workshop on Computational Geometry (FWCG 2013)},
  year={2013},
  url={https://drive.google.com/file/d/0B_e4DG2_6-rGUFlSN2oyQlFIYjQ/view?usp=sharing}
}

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