1. Bartolini, M. G., & Martignone, F. (2014). Manipulatives in mathematics education. In S. Lerman (Ed.), Encyclopedia of mathematics education (pp. 365–372). Dordrecht, Netherlands: Springer.
2. Basham, J., Meyer, H., & Perry, E. (2010). The design and application of the digital backpack. Journal of Research on Technology in Education, 42, 339–359.
3. Bortolossi, H. J. (2012). Criando conteúdos educacionais digitais em matemática e estatística com o uso integrado de tecnologias GeoGebra, JavaView, HTML, CSS, MathMLe JavaScript. Revista do Instituto GeoGebra de São Paulo, Journal od the Sao Paulo GeoGebra Institute, 1(1), 38–39.
4. Bos, B. (2009a). Technology with cognitive and mathematical fidelity: What it means for the math classroom. Computers in the Schools, 26(2), 107–114.
5. Bos, B. (2009b). Virtual math objects with pedagogical, mathematical, and cognitive fidelity. Computers in Human Behavior, 25, 521–528.