title: the demarcation protocol : a technique for maintaining constraints in distributed database systems daniel barbará , hector garcia-molina vldb j. 1994. authors: nan. venue: nan. year: nan
title: integrating triggers and declarative constraints in sql database sytems roberta cochrane , hamid pirahesh , nelson mendon &#231; a mattos very large data bases 1996. authors: nan. venue: nan. year: nan