Hattermann, M. (2012). Visualization - The Key Element for Expanding Geometrical Ideas to the 3D-Case: Beitrag in Topic Study Group 16: Visualization in the Teaching and Learning of Mathematics. *Proceedings of the 12th International Congress on Mathematical Education (ICME—12)* (S. 3053-3062). Seoul: International Congress on Mathematical Education ICME 12.

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","frontiers":"Hattermann, M. (2012). “Visualization - The Key Element for Expanding Geometrical Ideas to the 3D-Case: Beitrag in Topic Study Group 16: Visualization in the Teaching and Learning of Mathematics” in Visualization - The Key Element for Expanding Geometrical Ideas to the 3D-Case: Beitrag in Topic Study Group 16: Visualization in the Teaching and Learning of Mathematics.

In: Proceedings of the 12th International Congress on Mathematical Education (ICME—12). Seoul: International Congress on Mathematical Education ICME 12: 3053-3062.","aps":" M. Hattermann, Visualization - The Key Element for Expanding Geometrical Ideas to the 3D-Case: Beitrag in Topic Study Group 16: Visualization in the Teaching and Learning of Mathematics, in

Hattermann, Mathias. 2012. “Visualization - The Key Element for Expanding Geometrical Ideas to the 3D-Case: Beitrag in Topic Study Group 16: Visualization in the Teaching and Learning of Mathematics”. In *Proceedings of the 12th International Congress on Mathematical Education (ICME—12)*, 3053-3062. Seoul: International Congress on Mathematical Education ICME 12.

","wels":"Hattermann, M. (2012): Visualization - The Key Element for Expanding Geometrical Ideas to the 3D-Case: Beitrag in Topic Study Group 16: Visualization in the Teaching and Learning of Mathematics. In: Proceedings of the 12th International Congress on Mathematical Education (ICME—12). Seoul: International Congress on Mathematical Education ICME 12. S. 3053-3062.","mla":"Hattermann, Mathias. “Visualization - The Key Element for Expanding Geometrical Ideas to the 3D-Case: Beitrag in Topic Study Group 16: Visualization in the Teaching and Learning of Mathematics”. In: Proceedings of the 12th International Congress on Mathematical Education (ICME—12). Seoul: International Congress on Mathematical Education ICME 12: 3053-3062.","apa":"Hattermann, M. (2012). Visualization - The Key Element for Expanding Geometrical Ideas to the 3D-Case: Beitrag in Topic Study Group 16: Visualization in the Teaching and Learning of Mathematics.