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Journal of Mathematical Analysis and Applications > 2016 > 437 > 1 > 526-544
Journal of Mathematical Analysis and Applications > 2014 > 414 > 2 > 641-655
Journal of Mathematical Analysis and Applications > 2016 > 437 > 1 > 526-544
Journal of Mathematical Analysis and Applications > 2014 > 414 > 2 > 641-655