@techreport{csplib,
author= "I.P. Gent and T. Walsh",
title= "CSPLib: a benchmark library for constraints",
institution= "Technical report APES-09-1999",
year= "1999",
note= "Available from http://csplib.cs.strath.ac.uk/. A shorter version
appears in the Proceedings of the 5th International Conference 
on Principles and Practices of Constraint Programming (CP-99)."}