Journal of Mathematical Analysis and Applications
Journal of Mathematical Analysis and Applications > 2008 > 337 > 1 > 686-694
Journal of Mathematical Analysis and Applications > 2008 > 337 > 1 > 712-725
Journal of Mathematical Analysis and Applications > 2008 > 340 > 2 > 884-891
Journal of Mathematical Analysis and Applications > 2008 > 341 > 1 > 601-612