B, G.M. Opinion: Multifocals and Progressives Alternative not Superiority. Canadian Journal of Optometry, [S. l.], v. 44, n. 2, p. 2, 1982. DOI: 10.15353/cjo.v44i2.4208. Disponível em: https://openjournals.uwaterloo.ca/index.php/cjo/article/view/4208. Acesso em: 26 jul. 2024.