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Journal of Inequalities and Applications > 2012 > 2012 > 1 > 1-8
Journal of Mathematical Analysis and Applications > 2005 > 301 > 2 > 265-275
Journal of Mathematical Analysis and Applications > 2003 > 285 > 2 > 436-443
Journal of Mathematical Analysis and Applications > 2000 > 252 > 1 > 389-401