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Communications in Nonlinear Science and Numerical Simulation > 2007 > 12 > 7 > 1283-1290
Computers and Mathematics with Applications > 2006 > 52 > 3-4 > 459-470
Applied Mathematics and Computation > 2006 > 177 > 2 > 488-494
Applied Mathematics and Computation > 2002 > 131 > 2-3 > 517-529