On the periodic nature of some max-type difference equations. Elabbasy, E.M.; El-Metwally, H.; Elsayed, E.M. — 2005 International Journal of Mathematics and Mathematical Sciences
On the difference equation x n + 1 = a x n - b x n / ( c x n - d x n - 1 ) . Elabbasy, E.M.; El-Metwally, H.; Elsayed, E.M. — 2006 Advances in Difference Equations [electronic only]