MYLEIKO, G. L.; SOLODKII, S. G. Hyperbolic cross and complexity of various classes of linear ill-posed problems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 7, p. 951–963, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1748. Acesso em: 7 apr. 2025.