ÇEVIK, C.; ALTUN, I. Vector metric spaces and some properties. Topological Methods in Nonlinear Analysis, [S. l.], v. 34, n. 2, p. 375–382, 2009. Disponível em: https://apcz.umk.pl/TMNA/article/view/TMNA.2009.048. Acesso em: 29 mar. 2024.