HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS, cilt.44, sa.2, ss.331-339, 2015 (SCI-Expanded)
In this work we establish some new sufficient conditions for oscillation of fourth-order nonlinear neutral delay dynamic equations of the form (a(t)([x(t) - p(t) x(h(t))](Delta Delta Delta))(alpha))(Delta) + q(t)x(beta)(g(t)) = 0, t is an element of [t(0),infinity) T, where alpha and beta are quotients of positive odd integers with beta <= alpha.