@conference{Bistarelli00,
author = "S. Bistarelli and R Gennari and F. Rossi",
address = "Singapore",
booktitle = "Principles and Practice of Constraint Programming - CP
                   2000",
month = "sep",
pages = "83-97",
series = "LNCS",
title = "{C}onstraint propagation for {S}oft {C}onstraints:
                   generalizationand {T}ermination conditions",
volume = "1894",
year = "2000",
}