Nonlinear Analysis: Theory, Methods & Applications
Nonlinear Analysis > 2011 > 74 > 10 > 3379-3385
Nonlinear Analysis > 2011 > 74 > 12 > 4186-4191
Nonlinear Analysis > 2011 > 74 > 10 > 3379-3385
Nonlinear Analysis > 2011 > 74 > 12 > 4186-4191