*Article* **Oscillation Criteria of Higher-order Neutral Differential Equations with Several Deviating Arguments**

#### **Osama Moaaz 1,†, Ioannis Dassios 2,\*,† and Omar Bazighifan 3,4,†**


Received: 19 February 2020; Accepted: 11 March 2020; Published: 13 March 2020

**Abstract:** This work is concerned with the oscillatory behavior of solutions of even-order neutral differential equations. By using the technique of Riccati transformation and comparison principles with the second-order differential equations, we obtain a new Philos-type criterion. Our results extend and improve some known results in the literature. An example is given to illustrate our main results.

**Keywords:** even-order differential equations; neutral delay; oscillation
