title: the mentor workbench for enterprise-wide workflow management. authors: jeanine weißenfels , dirk wodtke , angelika kotz dittrich , gerhard weikum , peter muth. venue: sigmod conference. year: 1997
title: workflow history management. authors: pinar koksal , sena nural arpinar , asuman dogac. venue: acm sigmod record. year: 1998