Roa González, Julián, and Mercedes Hidalgo-Herrero. “Didactic Transposition in the Teaching of Geometry in Spain During the 1960s”. Educação Matemática Pesquisa 24, no. 2 (August 31, 2022): 433–464. Accessed December 5, 2025. https://revistas.pucsp.br/index.php/emp/article/view/57414.