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.  

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., & Kreis Y.  (2008).  Intergeo ? Interoperable Interactive Geometry for Europe.  Beiträge zum Mathematikunterricht. Vorträge auf der 42. Tagung für Didaktik der Mathematik in Budapest.  

Kortenkamp, U., & Kreis Y.  (2008).  Intergeo ? Interoperable Interactive Geometry for Europe.  Beiträge zum Mathematikunterricht. Vorträge auf der 42. Tagung für Didaktik der Mathematik in Budapest.