Nagle R. Kent. (1993). Fundamentals of differential equations and boundary value problems. Massachusetts: Addison Wesley.
Παραπομπή Chicago StyleNagle R. Kent. Fundamentals of Differential Equations and Boundary Value Problems. Massachusetts: Addison Wesley, 1993.
Παραπομπή MLANagle R. Kent. Fundamentals of Differential Equations and Boundary Value Problems. Massachusetts: Addison Wesley, 1993.
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