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Nonlinear Analysis > 2012 > 75 > 4 > 2126-2138
Communications in Nonlinear Science and Numerical Simulation > 2011 > 16 > 10 > 3914-3922
Theoretical and Mathematical Physics > 2009 > 160 > 1 > 1014-1021
Nonlinear Analysis > 2012 > 75 > 4 > 2126-2138
Communications in Nonlinear Science and Numerical Simulation > 2011 > 16 > 10 > 3914-3922
Theoretical and Mathematical Physics > 2009 > 160 > 1 > 1014-1021