Victor Giraldo
and Luiz Mariano Carvalho
and David TallProceedings of the 27 thAnnual Conference of the International Group for the Psychology of Mathematics Education
445-452
(2003)
Moustapha Sadibou Tall
and Maurice Ndeye
and Di{\`e}ne Ndiaye
and Christian Sina Diatta
and Ismaila DiedhiouPhysica A: Statistical and Theoretical Physics333
168--182
(2004)
Lillie Crowley
and Michael Thomas
and David TallProceedings of the 18th International Conference for the Psychology of Mathematics Education (PME)
240--247
(1994)