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PERKO, LAWRENCE. (). DIFFERENTIAL EQUATIONS AND DYNAMICAL... . : Springer-Verlag.

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PERKO, LAWRENCE. DIFFERENTIAL EQUATIONS AND DYNAMICAL.... : Springer-Verlag, . Book.

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PERKO, LAWRENCE. DIFFERENTIAL EQUATIONS AND DYNAMICAL.... : Springer-Verlag, . Book.

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PERKO, LAWRENCE. DIFFERENTIAL EQUATIONS AND DYNAMICAL.... : Springer-Verlag, . Book.