Journal of Mathematical Analysis and Applications
Journal of Mathematical Analysis and Applications > 2008 > 338 > 1 > 209-222
Journal of Mathematical Analysis and Applications > 2008 > 343 > 1 > 557-566
Journal of Mathematical Analysis and Applications > 2008 > 344 > 2 > 1165-1175
Journal of Mathematical Analysis and Applications > 2008 > 348 > 1 > 234-243