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*Weigand,H. G., Peter-Koop, A., Neill, N., [[Kristina Reiss|Reiss, K.]], Törner, G. & Wollring, B.(Eds.). (2001). ''Developments in Mathematics Education in German-Speaking Countries. Selected Papers from the Annual Conference on Didactics of Mathematics, Munich, 1998''. Hildesheim:Franzbecker.
 
*Weigand,H. G., Peter-Koop, A., Neill, N., [[Kristina Reiss|Reiss, K.]], Törner, G. & Wollring, B.(Eds.). (2001). ''Developments in Mathematics Education in German-Speaking Countries. Selected Papers from the Annual Conference on Didactics of Mathematics, Munich, 1998''. Hildesheim:Franzbecker.
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*Weigand,H. G., Cohors-Fresenborg, E., Houston, K., Maier, H., Peter-Koop, A., [[Kristina Reiss|Reiss, K.]],Törner, G. & Wollring, B. (Eds.). (2001).''Developments in Mathematics Education in Germany. Selected Papers from the Annual Conference on Didactics of Mathematics, Leipzig, 1997''. Hildesheim: Franzbecker.
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*Weigand,H. G., [[Elmar Cohors-Fresenborg|Cohors-Fresenborg, E.]], Houston, K., Maier, H., Peter-Koop, A., [[Kristina Reiss|Reiss, K.]],Törner, G. & Wollring, B. (Eds.). (2001).''Developments in Mathematics Education in Germany. Selected Papers from the Annual Conference on Didactics of Mathematics, Leipzig, 1997''. Hildesheim: Franzbecker.
    
*Weigand,H. G., Cohors-Fresenborg, E., Houston, K., Maier, H., Peter-Koop, A., [[Kristina Reiss|Reiss, K.]],Törner, G. & Wollring, B. (Eds.). (2001). ''Developments in Mathematics Education in Germany. Selected Papers from the Annual Conference on Didactics of Mathematics, Regensburg, 1996''. Hildesheim: Franzbecker.
 
*Weigand,H. G., Cohors-Fresenborg, E., Houston, K., Maier, H., Peter-Koop, A., [[Kristina Reiss|Reiss, K.]],Törner, G. & Wollring, B. (Eds.). (2001). ''Developments in Mathematics Education in Germany. Selected Papers from the Annual Conference on Didactics of Mathematics, Regensburg, 1996''. Hildesheim: Franzbecker.