MATTSON, D. A. A Note on Equimorphisms of Proximity Spaces. MATHEMATICA SCANDINAVICA, [S. l.], v. 22, p. 143–144, 1968. DOI: 10.7146/math.scand.a-10878. Disponível em: https://www.mscand.dk/article/view/10878. Acesso em: 6 may. 2024.