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18 D. M˘arghidanu

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[5] M˘arghidanu D., D´ıaz-Barrero J.L., R˘adulescu S., New Refinements of Some Classical
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[6] M˘arghidanu D., Proposed problem, in Mathematical Inequalities, oct. 2020, https://www.
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[7] M˘arghidanu D., Proposed problem, in Romanian Mathematical Magazine, oct. 2021, https:
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[8] Mitrinovi´c D.S., Pecari´c J.E., Fink A.M., Classical and New Inequalities in Analysis, Kluwer
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