@inproceedings{ACGGLMMT05,
  author    = {Marco Alberti and Federico Chesani and Alessio Guerri and Marco Gavanelli and Evelina Lamma and Paola Mello and Michela Milano and Paolo Torroni},
  title     = {Expressing Interaction in Combinatorial Auction through Social Integrity Constraints},
  booktitle = {19th Workshop on (Constraint) Logic Programming (W(C)LP)},
  year      = {2005},
  pages     = {53-64},
  place     = {Ulm, Germany},
  publisher = {Universit{\"a}t Ulm, Germany},
  series    = {Ulmer Informatik-Berichte},
  volume    = {2005-01},
  ee        = {http://www.informatik.uni-ulm.de/epin/pw/11541}
}