Libbrecht, P., & Kortenkamp U.  (2013).  The Role of Metadata in the Design of Educational Activities.  Proceedings of CERME 8, Antalya.  

Libbrecht, P., Kortenkamp U., Rebholz S., & Müller W.  (2013).  Tales of a Companion Teacher Analytics.  (Vatrapu, R., Ed.).Proceedings of the 2nd International Workshop on Teaching Analytics (IWTA-2013).  

Trgalova, J., Kortenkamp U., Jahn A P., Libbrecht P., Mercat C., Recio T., et al.  (2011).  I2Geo.net ? a platform for sharing dynamic geometry resources all over Europe.   

Libbrecht, P., Kortenkamp U., & Mercat C.  (2010).  Crossing Cultural Boundaries with Long Term Interactive Geometry Resources.   

Abánades, M., Botana F., Escribano J., Hendriks M., Kortenkamp U., Kreis Y., et al.  (2009).  The Intergeo File Format in Progress.  Proceedings of the 22nd OpenMath Meeting.  

Abánades, M., Botana F., Escribano J., Hendriks M., Kortenkamp U., Kreis Y., et al.  (2009).  The Intergeo File Format in Progress.  Proceedings of the 22nd OpenMath Meeting.  

Libbrecht, P., Kortenkamp U., & Mercat C.  (2009).  I2Geo: a Web-Library of Interactive Geometry.  (Sojka, P., Ed.).Proceedings of the 2nd Workshop Towards a Digital Mathematics Library (DML-2009).  

Kortenkamp, U., Blessing A. M., Dohrmann C., Kreis Y., Libbrecht P., & Mercat C.  (2009).  Interoperable Interactive Geometry For Europe ? First Technological and Educational Results and Future Challenges of the Intergeo Project.  Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France).  

Kortenkamp, U., Blessing A. M., Dohrmann C., Kreis Y., Libbrecht P., & Mercat C.  (2009).  Interoperable Interactive Geometry For Europe ? First Technological and Educational Results and Future Challenges of the Intergeo Project.  Proceedings of the Sixth Congress of the European Society for Research in Mathematics Education. January 28th - February 1st 2009, Lyon (France).  

Kortenkamp, U., & Materlik D.  (2004).  Pen-based input of geometric constructions.  (Libbrecht, P., Ed.).Proceedings of MathUI 2004.  

Kortenkamp, U., & Richter-Gebert J.  (2004).  Using Automatic Theorem Proving to Improve the Usability of Geometry Software.  (Libbrecht, P., Ed.).Proceedings of MathUI 2004.