1. R. DeVault, G. Ladas, S. W. Schultz, On the recursive sequencexn=Axn+1/xn, Proc. Amer. Math. Soc.
2. On a rational recursive sequence;Grove;Comm. Appl. Nonlinear Anal.,1994
3. Classification of invariants for certain difference equations;Grove,1997
4. Global Behavior of Nonlinear Difference Equations of Higher Order with Applications;Kocic,1993
5. On rational recursive sequences;Kocic;J. Math. Anal. Appl.,1993