Nonlinear Analysis: Theory, Methods & Applications
Nonlinear Analysis > 2009 > 70 > 9 > 3424-3436
Nonlinear Analysis > 2010 > 73 > 6 > 1715-1728
Nonlinear Analysis > 2011 > 74 > 17 > 6758-6769
Nonlinear Analysis > 2012 > 75 > 1 > 177-181
Nonlinear Analysis > 2013 > 81 > Complete > 211-223