N. Pinkwart, C. Schäfer, and H. U. Hoppe. Lightweight Extensions of Collaborative Modeling Systems for Synchronous Use on PDA's. Proceedings of the IEEE International Workshop on Wireless and Mobile Technologies in Education (WMTE), IEEE Computer Society Press, 2002.

N. Pinkwart, H. U. Hoppe, L. Bollen, and E. Fuhlrott. Group-Oriented Modelling Tools with Heterogeneous Semantics. Proceedings of the 6th International Conference on Intelligent Tutoring Systems (ITS), Springer Verlag, issue 2363, 2002.

H. U. Hoppe, N. Pinkwart, A. Lingnau, D. Hofmann, and M. Kuhn. Designing and Supporting Collaborative Modelling Activities in the Classroom. Information and Communication Technologies in Education Volume I: Proceedings of 3rd Hellenic Conference on ICT in Education (HICTE), KASTANIOTIS Editions, 2002.

L. Bollen, H. Hoppe, M. Milrad, and N. Pinkwart. Collaborative Modelling in Group Learning Environments. Proceedings of the 20th International Conference of the System Dynamics Society (SDS), System Dynamics Society, 2002.