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Dyfyniad Arddull ChicagoWilliamson, Richard E. Introduction to Differential Equations and Dynamical Systems. New York: The McGraw Hill Companies, Inc, 1997.
Dyfyniad MLAWilliamson, Richard E. Introduction to Differential Equations and Dynamical Systems. The McGraw Hill Companies, Inc, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.