MathSciNet bibliographic data MR2459008 39A11 Yang, Yi; Yang, Xiaofan On the difference equation $x\sb {n+1}=\frac{px\sb {n-s}+x\sb {n-t}}{qx\sb {n-s}+s\sb {n-t}}$$x\sb {n+1}=\frac{px\sb {n-s}+x\sb {n-t}}{qx\sb {n-s}+s\sb {n-t}}$. Appl. Math. Comput. 203 (2008), no. 2, 903–907. Article

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