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Nonlinear Analysis > 2004 > 56 > 4 > 465-484
Nonlinear Analysis: Real World Applications > 2003 > 4 > 4 > 599-613
Mathematical Biosciences > 2003 > 181 > 1 > 55-83
Nonlinear Analysis > 2004 > 56 > 4 > 465-484
Nonlinear Analysis: Real World Applications > 2003 > 4 > 4 > 599-613
Mathematical Biosciences > 2003 > 181 > 1 > 55-83