Warning - the bibtex entry below may be invalid: 
Missing 'booktitle' field 
@inproceedings{ModSymWorkshop,
  author = "Karen Petrie",
  journal = "In Proc. International Workshop on Modelling and Solving Problems with Constraints",
  note = "Workshop held in conjunction with IJCAI 05",
  pages = "18-26",
  title = "Modelling and Dynamic Symmetry Breaking",
  year = "2005",
}