Fest, A., & Kortenkamp U.  (2009).  Process Orientated Learning Environments For Interactive Geometry Lessons.  (Bardini, C., Fortin C., Oldknow A., & Vagost D., Ed.).Proceedings of the 9th International Conference on Technology in Mathematics Teachingh International Conference on Technology in Mathematics Teaching.  

Fest, A., & Kortenkamp U.  (2009).  Teaching Graph Algorithms with Visage.  Teaching Mathematics and Computer Science. 7, 35-50.

Kortenkamp, U., & Fest A.  (2008).  From CAS/DGS Integration to Algorithms in Educational Math Software.  Proceedings of ATCM 08.