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Journal of Inequalities and Applications > 2013 > 2013 > 1 > 1-18
Applied Mathematics and Computation > 2011 > 218 > 3 > 729-733
Applied Mathematics Letters > 2010 > 23 > 5 > 633-637
Annales UMCS, Mathematica > 2009 > 63 > 1 > 29-38
Journal of Mathematical Analysis and Applications > 2008 > 337 > 2 > 1261-1266
Computers and Mathematics with Applications > 2006 > 52 > 3-4 > 323-330