Mirjana Mazuran Elisa Quintarelli Rosalba Rossato Letizia Tanca Mining Violations to Relax Relational Database Constraints. 339-353 2009 DaWaK http://dx.doi.org/10.1007/978-3-642-03730-6_27 conf/dawak/2009 db/conf/dawak/dawak2009.html#MazuranQRT09