title: integrating triggers and declarative constraints in sql database sytems. authors: roberta cochrane , hamid pirahesh , nelson mendonça mattos. venue: vldb. year: 1996
title: integrating temporal , real-time , an active databases. authors: krithi ramamritham , raju sivasankaran , john a. stankovic , don t. towsley , ming xiong. venue: acm sigmod record. year: 1996