Griffiths, P. (1983). Exterior differential systems and the calculus of variations. Birkhäuser.
Citación estilo ChicagoGriffiths, Phillip. Exterior Differential Systems and the Calculus of Variations. Boston: Birkhäuser, 1983.
Cita MLAGriffiths, Phillip. Exterior Differential Systems and the Calculus of Variations. Boston: Birkhäuser, 1983.
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