Title: Conceptual Modeling: Current Issues and Future Directions, Author: Peter P. Chen
Title: Advances in Conceptual Modeling: ER'99 Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling Paris, France, November 15-18, 1999 Proceedings, Author: Peter P. Chen
Title: Active Conceptual Modeling of Learning: Next Generation Learning-Base System Development, Author: Peter P. Chen