A third-order damped neutral sublinear differential equation for which its differential operator is oscillatory is studied. Sufficient conditions are given under which every solution is either oscillatory or the derivative of its neutral term is oscillatory (or it tends to zero).
"Oscillation of third-order neutral differential equations with oscillatory operator,"
Turkish Journal of Mathematics: Vol. 46:
8, Article 2.
Available at: https://journals.tubitak.gov.tr/math/vol46/iss8/2