Journal of Mathematical Analysis and Applications
Journal of Mathematical Analysis and Applications > 2006 > 324 > 1 > 248-261
Journal of Mathematical Analysis and Applications > 2008 > 344 > 2 > 921-926
Journal of Mathematical Analysis and Applications > 2008 > 344 > 2 > 1048-1056
Journal of Mathematical Analysis and Applications > 2009 > 359 > 2 > 765-779
Journal of Mathematical Analysis and Applications > 2010 > 364 > 2 > 366-383