Open-Source GIS

@inproceedings{Vatsavai2012OpenSourceG,
  title={Open-Source GIS},
  author={Ranga Raju Vatsavai and Thomas E. Burk and Stephen Lime and Marco Hugentobler and Andreas Neumann and Christian Strobl},
  booktitle={Springer Handbook of Geographic Information},
  year={2012}
}