Hilfer-Hadamard Volterra Fractional Integro-Differential Equations with Initial Conditions. Punjab University Journal of Mathematics, [S. l.], v. 57, n. 7, p. 727–742, 2025. DOI: 10.52280/raq8wm73. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/618. Acesso em: 2 sep. 2026.