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L'Evolution psychiatrique > 2013 > 78 > 4 > 583-597
Interchange > 2011 > 42 > 4 > 363-388
Educational Studies in Mathematics > 2011 > 77 > 2-3 > 267-284
L'Evolution psychiatrique > 2013 > 78 > 4 > 583-597
Interchange > 2011 > 42 > 4 > 363-388
Educational Studies in Mathematics > 2011 > 77 > 2-3 > 267-284