Updates are available Correction dated 2016-03-29

Click to view Correction: https://doi.org/10.1186/s13661-016-0579-6

New results of positive solutions for the Sturm-Liouville problem

Crossref DOI link: https://doi.org/10.1186/s13661-016-0571-1

Published Online: 2016-03-16

Published Print: 2016-12

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