Electronic Journal of Differential Equations, Vol. 2012 (2012), No. 29, pp. 1-9. Title: Oscillation of solutions to third-order half-linear neutral differential equations Authors: Jozef Dzurina (Technical Univ. of Kosice, Slovakia) Ethiraju Thandapani (Univ. of Madras, Chennai, India) Sivaraj Tamilvanan (Univ. of Madras, Chennai, India) Abstract: In this article, we study the oscillation of solutions to the third-order neutral differential equations $$ \Big(a(t)\big([x(t)\pm p(t)x(\delta(t))]''\big)^\alpha\Big)' + q(t)x^\alpha(\tau(t)) = 0. $$ Sufficient conditions are established so that every solution is either oscillatory or converges to zero. In particular, we extend the results obtain in [1] for $a(t)$ non-decreasing, to the non-increasing case. Submitted November 12, 2011. Published February 21, 2012. Math Subject Classifications: 34K11, 34C10. Key Words: Third-order neutral differential equation; Riccati transformation; oscillation of solutions.