Kečkić D. J. Orthogonality and smooth points in \( C(K) \) and \( C_b(\Omega) \). Eurasian Mathematical Journal, [S. l.], v. 3, n. 4, p. 44–52, 2012. Disponível em: https://emj.enu.kz/index.php/main/article/view/806. Acesso em: 9 oct. 2025.