BURENKOV, V. 5th International Сonference “Function spaces. Differential operators. Problems of mathematical education” (November 26-29, 2018, Moscow, Russia). Eurasian Mathematical Journal, [S. l.], v. 9, n. 4, 2024. Disponível em: https://emj.enu.kz/index.php/main/article/view/135. Acesso em: 22 dec. 2024.