NARANG, T. D. ON SOME APPROXIMATION PROBLEMS IN METRIC SPACES. Tamkang Journal of Mathematics, [S. l.], v. 22, n. 1, p. 99–103, 1991. DOI: 10.5556/j.tkjm.22.1991.4578. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4578. Acesso em: 24 apr. 2024.