Marc Meister Khalil Djelloul Jacques Robin A Unified Semantics for Constraint Handling Rules in Transaction Logic. 201-213 2007 conf/lpnmr/2007 LPNMR http://dx.doi.org/10.1007/978-3-540-72200-7_18 db/conf/lpnmr/lpnmr2007.html#MeisterDR07