SAMKO, N.; SAMKO, S.; VAKULOV, B. Fractional integrals and hypersingular integrals in variable order Holder spaces on homogeneous spaces. Armenian Journal of Mathematics, Yerevan, Armenia, v. 2, n. 2, p. 38–64, 2009. Disponível em: http://test.armjmath.sci.am/index.php/ajm/article/view/52. Acesso em: 9 may. 2026.