By Peltenburg Marjolijn   van den Heuvel-Panhuizen Marja   Robitzsch Alexander   in Research Papers in Education

ISSN:1470-1146|25|3|319-334

Routledge Ltd‎(2010)‎

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By van den Heuvel-Panhuizen Marja   Kolovou Angeliki   Robitzsch Alexander   in Educational Studies in Mathematics

ISSN:0013-1954|84|3|281-307

Springer Publishing Company ‎(2013)‎

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