Further interval oscillation theorems for second-order neutral equations with damping and distributed deviating arguments

Further oscillation theorems of a class of second-order neutral equations are discussed. These theorems are discussed with the condition that f₁(y(t)) is nonmonotonic. These theorems are of higher degree of generality and deal with the cases which are not covered by the known criteria. Particularly, these criteria extend and unify a number of existing results.