1 "Visualization in 3-dimensional geometry In search of a framework" 1 : 3-19, 1996
2 "Thinking in three dimensions: Exploring students' geometric thinking and spatial ability with the Geometer's Sketchpad" 2001
3 "The question of how spatial ability is defined and its relevance to mathematics education" 8-20, 1983
4 "The development of spatial concepts and their role in the mastery of elementary geometric knowledge Soviet Studies in the Psychology of Learning and Teaching Mathematics University of Chicago Press" 5 : 145-168, 1971
5 "Representation, vision and visualization: cognitive functions in mathematical thinking. Basic issues for learning" 3-26, 1999
6 "Psychological aspects of learning geometry" Cambridge University Press 70-95, 1990
7 "Principles and standards for school mathematics" Reston: National Council of Teachers of Mathematics, Inc. 2000
8 "Mathematics as an educational task" Reidel Publishing Company 1973
9 "Le discernment des plans: un seuil dcisif dans l'apprentissage de la gomtrie tridimensinnelle" Thse U.L.P.: Strasbourg 1997
10 "Intuition in science and mathematics" Reidel Publishing Company 1987
1 "Visualization in 3-dimensional geometry In search of a framework" 1 : 3-19, 1996
2 "Thinking in three dimensions: Exploring students' geometric thinking and spatial ability with the Geometer's Sketchpad" 2001
3 "The question of how spatial ability is defined and its relevance to mathematics education" 8-20, 1983
4 "The development of spatial concepts and their role in the mastery of elementary geometric knowledge Soviet Studies in the Psychology of Learning and Teaching Mathematics University of Chicago Press" 5 : 145-168, 1971
5 "Representation, vision and visualization: cognitive functions in mathematical thinking. Basic issues for learning" 3-26, 1999
6 "Psychological aspects of learning geometry" Cambridge University Press 70-95, 1990
7 "Principles and standards for school mathematics" Reston: National Council of Teachers of Mathematics, Inc. 2000
8 "Mathematics as an educational task" Reidel Publishing Company 1973
9 "Le discernment des plans: un seuil dcisif dans l'apprentissage de la gomtrie tridimensinnelle" Thse U.L.P.: Strasbourg 1997
10 "Intuition in science and mathematics" Reidel Publishing Company 1987
11 "Handbook of research on mathematics teaching and learning" Macmillan Publishing Company 420-464, 1992
12 "Geometry form a cognitive point a view" Dordrecht: Kluwer Academic Publishers 37-52, 1998
13 "Geometric and spatial thinking in young children" Reston, VA: National Council of Teachers of Mathematics 66-79, 1999
14 "For the learning of mathematics 2" 33-39, 1981
15 "Emergence and characterization of sex differences in spatial ability" 1479-1498, 1985