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Dyfyniad Arddull ChicagoSanders, J.A, and F. Verhulst. Averaging Methods in Non Linear Dynamic Al Systems. New York: Springer-Verlag, 1985.
Dyfyniad MLASanders, J.A, and F. Verhulst. Averaging Methods in Non Linear Dynamic Al Systems. Springer-Verlag, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.