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Nonlinear Analysis: Real World Applications > 2009 > 10 > 6 > 3381-3386
Communications in Nonlinear Science and Numerical Simulation > 2009 > 14 > 8 > 3250-3257
Nonlinear Analysis: Real World Applications > 2009 > 10 > 6 > 3381-3386
Communications in Nonlinear Science and Numerical Simulation > 2009 > 14 > 8 > 3250-3257