@inproceedings{conf/sigecom/GottlobG07,
  title = "On the complexity of combinatorial auctions: structured item graphs and hypertree decomposition",
  author = "Georg Gottlob and Gianluigi Greco",
  year = "2007",
  booktitle = "{Proceedings 8th ACM Conference on Electronic Commerce (EC-2007), San Diego, California, USA, June 11-15, 2007}",
  editor = "Jeffrey K. MacKie-Mason and David C. Parkes and Paul Resnick",
  isbn = "978-1-59593-653-0",
  pages = "152-161",
  publisher = "{ACM}",
  doi = "10.1145/1250910.1250934",
}