@inproceedings{SamerSzeider08,
 author = {Marko Samer and Stefan Szeider},
 booktitle = {Proceedings of CATS 2008, Computing: The Australasian
Theory Symposium, University of Wollongong, New
South Wales, Australia, January 22-25, 2008},
 editor = {J. Harland and P. Manyem},
 pages = {67-74},
 publisher = {Australian Computer Society},
 series = {Conferences in Research and Practice in 
Information Technology},
 title = {Tractable Cases of the 
Extended Global Cardinality Constraint},
 volume = {77},
 year = {2008}
}