{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T14:39:40Z","timestamp":1753886380387,"version":"3.41.2"},"reference-count":12,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2012,7,24]],"date-time":"2012-07-24T00:00:00Z","timestamp":1343088000000},"content-version":"vor","delay-in-days":205,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"DOI":"10.13039\/501100003091","name":"Shandong Province","doi-asserted-by":"publisher","award":["J09LA08","BS2011SF022"],"award-info":[{"award-number":["J09LA08","BS2011SF022"]}],"id":[{"id":"10.13039\/501100003091","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Excellent Young and Middle-Aged Scientists of Shandong Province","award":["J09LA08","BS2011SF022"],"award-info":[{"award-number":["J09LA08","BS2011SF022"]}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Applied Mathematics"],"published-print":{"date-parts":[[2012,1]]},"abstract":"<jats:p>By constructing a special cone in <jats:italic>C<\/jats:italic><jats:sup>1<\/jats:sup>[0, 2<jats:italic>\u03c0<\/jats:italic>]\n and the fixed point theorem, this paper investigates second\u2010order singular semipositone periodic boundary value problems with dependence on the first\u2010order derivative and obtains the existence of multiple positive solutions. 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