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Mathematical and Computer Modelling > 2008 > 48 > 5-6 > 700-711
Differential Equations and Dynamical Systems > 2008 > 16 > 1-2 > 3-27
Mathematical and Computer Modelling > 2008 > 48 > 5-6 > 700-711
Differential Equations and Dynamical Systems > 2008 > 16 > 1-2 > 3-27