Castro Filho, J., 		Castro, J., 		Souza, M., 		Freire, R., & 		Nascimento, G.
2020 Nov 22.  The Kingdom of Aljabar: the challenge of the two-plate scale: A Digital Educational Resource to Favor the Development of Algebraic Thought. Companion Proceedings of the Brazilian Congress on Computers in Education (CBIE). [Online] :