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Journal of Mathematical Analysis and Applications > 2007 > 333 > 1 > 311-328
Journal of Mathematical Analysis and Applications > 2006 > 318 > 2 > 742-757
Journal of Mathematical Analysis and Applications > 2007 > 333 > 1 > 311-328
Journal of Mathematical Analysis and Applications > 2006 > 318 > 2 > 742-757