Não informado. (1993). Calculus of Variations and Partial Differential Equations. Springer Verlag.
Citace podle Chicago (17th ed.)Não informado. Calculus of Variations and Partial Differential Equations. Berlin: Springer Verlag, 1993.
Citace podle MLA (8th ed.)Não informado. Calculus of Variations and Partial Differential Equations. Springer Verlag, 1993.
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