# Article

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Keywords:
oscillation; quasi-derivatives; delayed argument...
Summary:
In this paper, we study the oscillatory behavior of the solutions of the delay differential equation of the form $\left(\frac{1}{r(t)}y^{\prime }(t)\right)^{\prime }+p(t)y(\tau (t))= 0.$ The obtained results are applied to n-th order delay differential equation with quasi-derivatives of the form $L_nu(t)+p(t)u(\tau (t))=0.$
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