Chehlarova, N. (2025). 3D printed educational resources for studying percentages by people with visual impairments. E-journal “Pedagogical forum”, DIITT, Trakia University, Iss. 2, pp. 97-106, DOI: 10.15547/PF.2025.015, ISSN 1314-7986, https://drive.google.com/file/d/17ABi47dGc2WRWBjXSwEWduhyCHXr1AZD/view
