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Journal of Mathematical Analysis and Applications > 2018 > 468 > 1 > 324-343
Journal of Mathematical Analysis and Applications > 2012 > 393 > 1 > 222-230
Journal of Mathematical Analysis and Applications > 2018 > 468 > 1 > 324-343
Journal of Mathematical Analysis and Applications > 2012 > 393 > 1 > 222-230