HUSSAIN, E. A.; JASIM, A. S. Z-transform solution for nonlinear difference equations. Al-Mustansiriyah Journal of Science, [S. l.], v. 32, n. 4, p. 51–56, 2021. DOI: 10.23851/mjs.v32i4.1019. Disponível em: https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/1019. Acesso em: 6 jul. 2022.