@article{Walter:2012:BL:2185520.2185555,
 author = {Walter, Bruce and Khungurn, Pramook and Bala, Kavita},
 title = {Bidirectional lightcuts},
 journal = {ACM Trans. Graph.},
 issue_date = {July 2012},
 volume = {31},
 number = {4},
 month = jul,
 year = {2012},
 issn = {0730-0301},
 pages = {59:1--59:11},
 articleno = {59},
 numpages = {11},
 url = {http://doi.acm.org/10.1145/2185520.2185555},
 doi = {10.1145/2185520.2185555},
 acmid = {2185555},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {bidirectional ray tracing, global illumination},
} 

@inproceedings{Walter:2012:BL,
 author = {Walter, Bruce and Khungurn, Pramook and Bala, Kavita},
 title = {Bidirectional Lightcuts},
 booktitle = {ACM SIGGRAPH 2012 papers},
 series = {SIGGRAPH '12},
 year = {2012},
 pages = {59:1--59:11},
 articleno = {59},
 numpages = {11},
 url = {http://doi.acm.org/10.1145/1964921.1964939},
 doi = {10.1145/1964921.1964939},
 acmid = {2185555},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {bidirectional ray tracing, global illumination},
}