LIM, K.-P. CONSTRAINED APPROXIMATION OF A COMPACT SET IN A NORMED SPACE. Tamkang Journal of Mathematics, [S. l.], v. 21, n. 1, p. 89–100, 1990. DOI: 10.5556/j.tkjm.21.1990.4699. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/4699. Acesso em: 18 aug. 2022.