Nonlinear Analysis: Theory, Methods & Applications
Nonlinear Analysis > 2009 > 71 > 1-2 > 107-111
Nonlinear Analysis > 2009 > 71 > 1-2 > 172-178
Nonlinear Analysis > 2009 > 71 > 1-2 > 456-466
Nonlinear Analysis > 2009 > 71 > 3-4 > 1250-1262
Nonlinear Analysis > 2009 > 71 > 10 > 4984-4996