MAIOROV, V. E. Best approximation by ridge functions in $L_p$-spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 3, p. 396–408, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2875. Acesso em: 27 apr. 2025.