Leandro Marcos Alves Vaz,   The Didactic Transposition in Brazilian High School Physics Textbooks: A Comparative Study of Didactic Materials.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2017, vol. 124(4). 969 - 972
    [viewed 21 January 2022]. Available from: https://publications.waset.org/pdf/10007103.