PAVLOV , E. A. One Class of singular integral operators. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 43, n. 1, p. 105–110, 1991. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9312. Acesso em: 6 dec. 2025.