Oscillation of first order delay differential equations with distributed delay ✩

In this paper, we obtain some oscillation criteria for the first order delay differential equation with distributed delay x (t )+ b(t ) 0 R(t, s)x(t −s)dμ(s) = 0. By applying these results, we also establish some integral conditions for oscillation of the higher order delay differential equations.  2003 Elsevier Inc. All rights reserved.