@InProceedings{Will:Backofen:SymCon2003,
  author =	 {Sebastian Will and Rolf Backofen},
  title =	 {Breaking of Partial Symmetries in the Photo and
                  Alignment Problem},
  booktitle =	 {Proceedings of the Third International Workshop on
                  Symmetry in Constraint Satisfaction Problems (SymCon
                  2003)},
  pages =        {187--194},
  year =	 2003,
  editor =	 {Barbara Smith and Ian Gent and Warwick Harvey},
  user =	 {will},
  abstract =	 {Symmetry breaking by adding symmetric constraints
                  during search usually assumes that symmetric
                  constraints are simple. We identify symmetries with
                  complex symmetric constraints, where the symmetries
                  nevertheless can be handled by a similar method. For
                  this aim, we introduce partial symmetries. We
                  identify those symmetries in two problems. The photo
                  problem is a well known example problem, while the
                  alignment problem is a real world problem from
                  bioinformatics.}
}