LITVIN, E. G.; POLYAKOV, O. V. Asymmetric approximations in the space $L_{p(t)}$. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 51, n. 7, p. 952–959, 1999. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4684. Acesso em: 27 apr. 2025.