Nonlinear Analysis: Theory, Methods & Applications
Nonlinear Analysis > 2007 > 66 > 10 > 2246-2254
Nonlinear Analysis > 2011 > 74 > 17 > 6758-6769
Nonlinear Analysis > 2007 > 66 > 10 > 2246-2254
Nonlinear Analysis > 2011 > 74 > 17 > 6758-6769