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Nonlinear Analysis > 2010 > 72 > 7-8 > 3436-3446
Journal of Mathematical Analysis and Applications > 2003 > 287 > 2 > 348-364
Nonlinear Analysis > 2010 > 72 > 7-8 > 3436-3446
Journal of Mathematical Analysis and Applications > 2003 > 287 > 2 > 348-364