F. Arzarello. the 24th Conference of the International Group for the Psychology of Mathematics Education (PME), 1, стр. 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, и G. Philippou. Proceedings of the Fourth Congress of the European Society for Research in Mathematics Education, стр. 1061-1070. (2005)
G. Davis, и M. Mcgowen. proceedings of the Annual Meeting of the 26th Annual Meeting of the International Group for the Psychology of Mathematics Education (PME), 2, стр. 273-280. Norwich, UK, University of Norwich, (июля 2002)
L. Crowley, M. Thomas, и D. Tall. Proceedings of the 18th International Conference for the Psychology of Mathematics Education (PME), II, стр. 240--247. Lisbon, Portugal, (1994)
M. Sasman, A. Olivier, и L. Linchevski. Fifth Annual Congress of the Association for Mathematics Education of South Africa, 1, стр. 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)