Nonlinear Analysis: Theory, Methods & Applications
Nonlinear Analysis > 2009 > 71 > 11 > 5513-5521
Nonlinear Analysis > 2011 > 74 > 11 > 3510-3517
Nonlinear Analysis > 2009 > 71 > 11 > 5513-5521
Nonlinear Analysis > 2011 > 74 > 11 > 3510-3517