HASHEM, H.; EL-SAYED, A. SOLVABILITY OF COUPLED SYSTEMS OF FRACTIONAL ORDER INTEGRO-DIFFERENTIAL EQUATIONS. Journal of the Indonesian Mathematical Society, [S. l.], v. 19, n. 2, p. 111–121, 2014. DOI: 10.22342/jims.19.2.167.111-121. Disponível em: http://jims-a.org/index.php/jimsa/article/view/167. Acesso em: 27 apr. 2024.