Boyce, W. E. (1986). Elementary differential equations and boundary value problems. New York: Wiley.
Παραπομπή Chicago StyleBoyce, William E. Elementary Differential Equations and Boundary Value Problems. New York: Wiley, 1986.
Παραπομπή MLABoyce, William E. Elementary Differential Equations and Boundary Value Problems. New York: Wiley, 1986.
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