1. Askew M. LathamP. &Burns C.(2005).Learning from practice: Teachers and researchers in joint enquiry.Proceedings of the fifteenth international commission on mathematical instruction (ICMI) study: The professional education and development of teachers of mathematics Aquas de Lindoia Brazil.
2. Brown M. Kuchemann D. &Hodgen J.(2010).The struggle to achieve multiplicative reasoning 11–14. InM.Joubert&P.Andrews(Eds.) Proceedings of the British Congress for mathematics education April 2010(pp.49–56).