Boyce, W. E. (1969). Elementary differential equations and boundary value problems. Wiley Eastern.
Παραπομπή Chicago StyleBoyce, William E. Elementary Differential Equations and Boundary Value Problems. New York: Wiley Eastern, 1969.
Παραπομπή MLABoyce, William E. Elementary Differential Equations and Boundary Value Problems. Wiley Eastern, 1969.
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