<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">S. H. SAKER</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">OSCILLATION OF PERTURBED DELAY DYNAMIC EQUATIONS ON TIME SCALES</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">34C10</style></keyword><keyword><style  face="normal" font="default" size="100%">34K11</style></keyword><keyword><style  face="normal" font="default" size="100%">39A13</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2008</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2008</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.acadsol.eu/en/articles/12/2/9.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">12</style></volume><pages><style face="normal" font="default" size="100%">12</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;In this paper, we study the oscillation of second-order nonlinear perturbed delay dynamic equations on time scales. By using employing the Riccati substitution, we establish some sufficient conditions for oscillation. We also follow the technique that has been used in [20] and establish some different sufficient conditions for oscillation which can be considered as the extension of oscillation criteria established by Hille and Nehari for second-order differential equations and can be applied on the sublinear and superlinear cases. As a special case the results improve some oscillation criteria in the literature for perturbed dynamic equations without delay. Some examples are considered to illustrate the main results&lt;/p&gt;
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