1. Brand L: A sequence defined by a difference equation. Am. Math. Mon. 1955, 62: 489-492. 10.2307/2307362
2. Agarwal RP: Difference Equations and Inequalities. 1st edition. Dekker, New York; 1992. (2nd ed., (2000))
3. Gibbons CH, Kulenović MRS, Ladas G:On the recursive sequence "Equation missing" No EquationSource Format="TEX", only image and EquationSource Format="MATHML" . Math. Sci. Res. Hot-Line 2000, 4: 1-11.
4. Grove EA, Kostrov Y, Ladas G, Schultz SW: Riccati difference equations with real period-2 coefficients. Commun. Appl. Nonlinear Anal. 2007, 14: 33-56.
5. Taskara N, Uslu K, Tollu DT: The periodicity and solutions of the rational difference equation with periodic coefficients. Comput. Math. Appl. 2011, 62: 1807-1813. 10.1016/j.camwa.2011.06.024