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Our assumptions in each case are such that the problem possesses a lower solution or an upper solution.<\/jats:p>","DOI":"10.1017\/s0004972700030331","type":"journal-article","created":{"date-parts":[[2009,4,17]],"date-time":"2009-04-17T10:33:44Z","timestamp":1239964424000},"page":"439-451","source":"Crossref","is-referenced-by-count":17,"title":["Positive solutions for a class of semilinear two-point boundary value problems"],"prefix":"10.1017","volume":"45","author":[{"given":"Luis","family":"Sanchez","sequence":"first","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2009,4,17]]},"reference":[{"key":"S0004972700030331_ref018","first-page":"683","article-title":"Remarks on multiple periodic solutions for non-linear ordinary differential systems of Li\u00e9nard type","author":"Zanolin","year":"1982","journal-title":"Boll. Un. Mat. 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