H. S. Alshawee. (2015). On the Dynamics of the Nonlinear Rational Difference Equation x_{n+1}=Ax_{n}+Bx_{n-a}+((ax_{n-a}+bx_{n-k})/(cx_{n-a}+dx_{n-k})). Global Journal of Science Frontier Research, 15(F9), 33–43. Retrieved from https://journalofscience.org/index.php/GJSFR/article/view/102261