Hubbard, J. H., & West, B. H. (1990). Differential equations: A dynamical systems approach (Corr. 3rd print.). Springer.
Παραπομπή Chicago StyleHubbard, John H., και Beverly Henderson West. Differential Equations: A Dynamical Systems Approach. Corr. 3rd print. New York: Springer, 1990.
Παραπομπή MLAHubbard, John H., και Beverly Henderson West. Differential Equations: A Dynamical Systems Approach. Corr. 3rd print. Springer, 1990.
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