@inproceedings{kdd06liu,
   author = {Chao Liu and Chen Chen and Jiawei Han and Philip S. Yu},
   title = {GPLAG: detection of software plagiarism by program dependence graph analysis},
   booktitle = {KDD '06: Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining},   
   year = {2006},
   isbn = {1-59593-339-5},
   pages = {872--881},
   location = {Philadelphia, PA, USA},
   doi = {http://doi.acm.org/10.1145/1150402.1150522},
   publisher = {ACM Press},
   address = {New York, NY, USA},
}