GUAN, Chaoyue; NIU, Jing. A spectral operational matrix method using shifted fractional Legendre functions for nonlinear fractional Volterra integro-differential equations. Mathematical Modelling and Analysis, [S. l.], v. 31, n. 4, p. 649–670, 2026. DOI: 10.3846/mma.2026.24683. Disponível em: https://journals.vilniustech.lt/index.php/MMA/article/view/24683. Acesso em: 9 oct. 2026.