@inproceedings{Will:Backofen:SymCon2003,
author = {Will, Sebastian and Backofen, Rolf},
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)},
year = {2003},
doi = {},
user = {will},
pages = {187--194},
editor = {Barbara Smith and Ian Gent and Warwick Harvey},
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.}
}