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 (May 2015), 33–43.