ÁBRAHÁM, György. Principles of Correction of Colour Deficiency by Filter Glasses. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 45, n. 1, p. 3–10, 2001. Disponível em: https://pp.bme.hu/me/article/view/1401. Acesso em: 22 jul. 2025.