{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T11:12:11Z","timestamp":1760267531253,"version":"3.37.3"},"reference-count":11,"publisher":"World Scientific Pub Co Pte Ltd","issue":"04","funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["11431008"],"award-info":[{"award-number":["11431008"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"crossref","award":["11771296"],"award-info":[{"award-number":["11771296"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Bifurcation Chaos"],"published-print":{"date-parts":[[2018,4]]},"abstract":"<jats:p> In this paper, we consider the existence and number of periodic solutions for a class of delay differential equations of the form [Formula: see text], based on the Kaplan\u2013Yorke method. Especially, we consider a kind of delay differential equations with [Formula: see text] as a polynomial having parameters and find the number of periodic solutions with period [Formula: see text] or [Formula: see text]. <\/jats:p>","DOI":"10.1142\/s0218127418500517","type":"journal-article","created":{"date-parts":[[2018,5,4]],"date-time":"2018-05-04T04:40:47Z","timestamp":1525408847000},"page":"1850051","source":"Crossref","is-referenced-by-count":12,"title":["On the Number of Periodic Solutions of Delay Differential Equations"],"prefix":"10.1142","volume":"28","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8792-1256","authenticated-orcid":false,"given":"Maoan","family":"Han","sequence":"first","affiliation":[{"name":"Department of Mathematics, Shanghai Normal University, Shanghai 200234, P. R. 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