M. Suwa, und B. Tversky. Design studies, 18 (4):
385-403(1997)"sketches serve as a 'perceptual interface' through which one can discover non-visual functional relations underlying the visual features." p 401.
F. Arzarello. the 24th Conference of the International Group for the Psychology of Mathematics Education (PME), 1, Seite 23--38. Hiroshima, Japan, (2000)
D. Abrahamson. the Twenty Sixth Annual Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education, 2, Toronto, Ontario, Preney, (2004)
N. Mousoulides, und G. Philippou. Proceedings of the Fourth Congress of the European Society for Research in Mathematics Education, Seite 1061-1070. (2005)
G. Davis, und M. Mcgowen. proceedings of the Annual Meeting of the 26th Annual Meeting of the International Group for the Psychology of Mathematics Education (PME), 2, Seite 273-280. Norwich, UK, University of Norwich, (Juli 2002)
L. Crowley, M. Thomas, und D. Tall. Proceedings of the 18th International Conference for the Psychology of Mathematics Education (PME), II, Seite 240--247. Lisbon, Portugal, (1994)
M. Sasman, A. Olivier, und L. Linchevski. Fifth Annual Congress of the Association for Mathematics Education of South Africa, 1, Seite 177-182. Port Elizabeth, Port Elizabeth Technikon, (1999)
A. Paivio. Draft chapter presented at the conference on Pathways to Literacy Achievement for High Poverty Children at The University of Michigan School of Education, (2006)