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Saker, S. H.; Alzabut, Jehad O.; Mukheimer, A.: On the oscillatory behavior for a certain class of third order nonlinear delay difference equations. Electronic journal of qualitative theory of differential equations 67. pp. 1-16. (2010)
Saker, S. H.: Oscillation of second-order forced nonlinear dynamic equations on time scales. Electronic journal of qualitative theory of differential equations 23. pp. 1-17. (2005)
Saker, S. H.; Manoljović, Jelena V.: Oscillation criteria for second order superlinear neutral delay. Electronic journal of qualitative theory of differential equations 10. pp. 1-22. (2004)