title: strudel : a web-site management system. authors: alon y. levy , mary f. fernandez , jaewoo kang , daniela florescu , dan suciu. venue: sigmod conference. year: 1997
title: agflow : agent-based cross-enterprise workflow management system. authors: liangzhao zeng , boualem benatallah , phuong nguyen , anne h. h. ngu. venue: very large data bases. year: 2001