ABDULLAH , D. .S; RAFEEQ, A.; BUTRIS , R. N. Existence uniqueness and stability for certain operators of nonlinear system of differential equations. Bulletin of Social Informatics Theory and Application, [S. l.], v. 7, n. 2, p. 193–204, 2023. DOI: 10.31763/businta.v7i2.656. Disponível em: https://pubs.ascee.org/index.php/businta/article/view/656. Acesso em: 2 sep. 2025.