C. S. P. Jorge, P. L. Albuquerque, and F. Carvalho, “The use of 3D printing for the development of a learning tool for the visually impaired”., Int J Innov Educ Res, vol. 9, no. 9, pp. 387–398, Sep. 2021, doi: 10.31686/ijier.vol9.iss9.3353.