TEAM, S. On Best Approximation and Best Coapproximation: Tulsi Dass Narang, Sahil Gupta. Thai Journal of Mathematics, [S. l.], v. 14, n. 2, p. 505–516, 2016. Disponível em: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/614. Acesso em: 18 may. 2024.