Differential Equations & Applications · Volume 8, Issue 4 On the oscillation certain fourth order nonlinear dynamic equations with a nonlinear middle term 08-24 Pages 429-436 DOI 10.7153/dea-08-24 Downloads Short PDF Full PDF PNG Authors Said R. Grace Taher S. Hassan Keywords oscillation criteria fourth order dynamic equations time scales Subject classes 34K11 39A10 39A99 34C10 34C15 34N05