Nonlinear Analysis: Theory, Methods & Applications
Nonlinear Analysis > 2009 > 71 > 12 > e979-e990
Nonlinear Analysis > 2009 > 71 > 12 > 6276-6282
Nonlinear Analysis > 2009 > 71 > 12 > e979-e990
Nonlinear Analysis > 2009 > 71 > 12 > 6276-6282