R. Keil-Slawik, T. Hampel, and B. Eßmann. Proceedings 3rd IEEE Int. Conf. on Pervasive Computing and Communications PerCom 2005. Workshop on Pervasive ELearning PerEL'05, page 322-326. Kauai island, Hawaii, (March 2005)
N. Ragonis, and M. Ari. SIGCSE '05: Proceedings of the 36th SIGCSE technical symposium on Computer science education, page 226--230. New York, NY, USA, ACM Press, (2005)
H. Proper, V. Stuart, and S. Hoppenbrouwers. APCCM '05: Proceedings of the 2nd Asia-Pacific conference on Conceptual modelling, page 25--34. Darlinghurst, Australia, Australia, Australian Computer Society, Inc., (2005)
T. Kaiser. Proceedings of the 13th International Conference on Conceptual Structures (ICCS 2005), volume 3596 of Lecture Notes in Computer Science, page 195-208. Springer, (2005)