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 author = {Lance Williams},
 title = {Casting curved shadows on curved surfaces},
 booktitle = {SIGGRAPH '78: Proceedings of the 5th annual conference on Computer graphics and interactive techniques},
 year = {1978},
 pages = {270--274},
 doi = {http://doi.acm.org/10.1145/800248.807402},
 publisher = {ACM Press},
 address = {New York, NY, USA},
 }


@inproceedings{MT04,
 author = {Tobias Martin and Tiow-Seng Tan},
 title = {Anti-aliasing and Continuity with Trapezoidal Shadow Maps},
 booktitle = {Proceedings of the Eurographics Symposium on Rendering},
 year = {2004},
 location = {Norrk\"oping, Sweden},
 pages = {153--160},
 publisher = {Eurographics Association},
}

@inproceedings{WSP04,
 author = {Michael Wimmer and Daniel Scherzer and Werner Purgathofer},
 title = {Light Space Perspective Shadow Maps},
 booktitle = {Proceedings of the Eurographics Symposium on Rendering},
 year = {2004},
 location = {Norrk\"oping, Sweden},
 publisher = {Eurographics Association},
}

@inproceedings{Chong04,
 author = {Hamilton Y. Chong and Steven J. Gortler},
 title = {A lixel for every pixel},
 booktitle = {Proceedings of the Eurographics Symposium on Rendering},
 year = {2004},
 location = {Norrk\"oping, Sweden},
 publisher = {Eurographics Association},
}

@inproceedings{Chong06,
 author = {Hamilton Y. Chong and Steven J. Gortler},
 title = {Scene Optimized Shadow Maps},
 booktitle = {Harvard Technical Report TR-11-06},
 year = {2006},
}

@inproceedings{FFB01,
 author = {Randima Fernando and Sebastian Fernandez and Kavita Bala and Donald P. Greenberg},
 title = {Adaptive shadow maps},
 booktitle = {SIGGRAPH '01: Proceedings of the 28th annual conference on Computer graphics and interactive techniques},
 year = {2001},
 isbn = {1-58113-374-X},
 pages = {387--390},
 doi = {http://doi.acm.org/10.1145/383259.383302},
 publisher = {ACM Press},
 address = {New York, NY, USA},
}

@inproceedings{SD02,
 author = {Marc Stamminger and George Drettakis},
 title = {Perspective shadow maps},
 booktitle = {SIGGRAPH '02: Proceedings of the 29th annual conference on Computer graphics and interactive techniques},
 year = {2002},
 isbn = {1-58113-521-1},
 pages = {557--562},
 location = {San Antonio, Texas},
 doi = {http://doi.acm.org/10.1145/566570.566616},
 publisher = {ACM Press},
 address = {New York, NY, USA},
}

@inproceedings{RSC87,
 author = {William T. Reeves and David H. Salesin and Robert L. Cook},
 title = {Rendering antialiased shadows with depth maps},
 booktitle = {SIGGRAPH '87: Proceedings of the 14th annual conference on Computer graphics and interactive techniques},
 year = {1987},
 isbn = {0-89791-227-6},
 pages = {283--291},
 doi = {http://doi.acm.org/10.1145/37401.37435},
 publisher = {ACM Press},
 address = {New York, NY, USA},
}

@inproceedings{LV00,
 author = {Tom Lokovic and Eric Veach},
 title = {Deep Shadow Maps },
 booktitle = {SIGGRAPH '00: Proceedings of the 27th annual conference on Computer graphics and interactive techniques},
 year = {2000},
 publisher = {ACM Press},
 address = {New York, NY, USA},
}

@inproceedings{DL06,
 author = {William Donnelly and Andrew Lauritzen},
 title = {Variance shadow maps},
 booktitle = {SI3D '06: Proceedings of the 2006 symposium on Interactive 3D graphics and games},
 year = {2006},
 isbn = {1-59593-295-X},
 pages = {161--165},
 location = {Redwood City, California},
 doi = {http://doi.acm.org/10.1145/1111411.1111440},
 publisher = {ACM Press},
 address = {New York, NY, USA},
 }

 @article{bilas2000automatic,
  title={An Automatic Singleton Utility},
  author={Bilas, Scott},
  journal={Game Programming Gems. Charles River Media},
  pages={36--40},
  year={2000}
}
