VASIL’EVA, A. Kolmogorov widths of weighted Sobolev classes with “small” singularity sets . Eurasian Mathematical Journal, [S. l.], v. 10, n. 1, 2019. Disponível em: https://emj.enu.kz/index.php/main/article/view/142. Acesso em: 9 oct. 2025.