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The symmetry plays an important and fundamental role in the study of the oscillation of solutions of the equations. Examples are given to prove the significance of the new theorems.<\/jats:p>","DOI":"10.3390\/sym13071277","type":"journal-article","created":{"date-parts":[[2021,7,18]],"date-time":"2021-07-18T21:18:52Z","timestamp":1626643132000},"page":"1277","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["New Oscillation Criteria for Neutral Delay Differential Equations of Fourth-Order"],"prefix":"10.3390","volume":"13","author":[{"given":"Saeed","family":"Althubiti","sequence":"first","affiliation":[{"name":"Department of Mathematics and Statistics, College of Science, Taif University, P.O. 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