This article deals with the oscillation of a certain class of fourth-order delay differential equations. Some new oscillation criteria (including Hille- and Nehari-type criteria) are presented. The results obtained in the paper improve some results from [C. Zhang, T. Li, B. Sun, and E. Thandapani, Appl. Math. Lett., 24, 1618 (2011)]. Two examples are presented to illustrate our main results.
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Published in Neliniini Kolyvannya, Vol. 16, No. 3, pp. 322–335, July–September, 2013.
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Zhang, C., Li, T. & Saker, S.H. Oscillation of Fourth-Order Delay Differential Equations. J Math Sci 201, 296–309 (2014). https://doi.org/10.1007/s10958-014-1990-0
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DOI: https://doi.org/10.1007/s10958-014-1990-0