By Perrenet J.   Adan I.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|33|2|187-197

Taylor & Francis Ltd‎(2002)‎

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By Perrenet J. C.   Bouhuijs P. A. J.   Smits J. G. M. M.   in Teaching in Higher Education

ISSN:1470-1294|5|3|345-358

Routledge Ltd‎(2000)‎

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