Oprea, J. (1997). Differential geometry and its applications. Upper Saddle River, N. J.: Prentice Hall.
Παραπομπή Chicago StyleOprea, John. Differential Geometry and Its Applications. Upper Saddle River, N. J.: Prentice Hall, 1997.
Παραπομπή MLAOprea, John. Differential Geometry and Its Applications. Upper Saddle River, N. J.: Prentice Hall, 1997.
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