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Mathematical Methods in the Applied Sciences > 36 > 5 > 584 - 600
Applied Mathematics and Computation > 2013 > 219 > 10 > 5290-5302
Nonlinear Dynamics > 2013 > 71 > 1-2 > 1-12
Communications in Nonlinear Science and Numerical Simulation > 2012 > 17 > 4 > 1529-1541
Applied Mathematics and Computation > 2011 > 217 > 16 > 7021-7027