1. Adler, P. A., & Adler, P. (1994). Observational techniques. In N. K. Denzin & Y. S. Lincoln (Eds.), Handbook of qualitative research (pp. 377–392). Thousand Oaks, CA: Sage.
2. Albarracín, L., & Gorgorió, N. (2015). A brief guide to modelling in secondary school: Estimating big numbers. Teaching Mathematics and Its Applications, 34(4), 223–228.
https://doi.org/10.1093/teamat/hrv006
.
3. Alrø, H., Ravn, O., & Valero, P. (Eds.). (2010). Critical mathematics education: Past, present and future. Rotterdam, The Netherlands: Sense.
4. Araújo, J. L. (2007). Modelling and the critical use of mathematics. In C. Haines, P. Galbraith, W. Blum, & S. Khan (Eds.). Mathematical modelling: Education, engineering and economics (ICTMA 12) (pp. 187–194). Chichester: Horwood.
5. Araújo, J. L. (2013). Aprendizagem expansiva em projetos de modelagem orientados pela educação matemática crítica. Research project. Belo Horizonte: Department of Mathematics at the Federal University of Minas Gerais (UFMG).