Goursat, E. (1964). Variation of solutions: Partial differential equations of the second order.
シカゴスタイル引用形Goursat, Edouard. Variation of Solutions: Partial Differential Equations of the Second Order. Dover Publcations, New York, 1964.
MLA引用形式Goursat, Edouard. Variation of Solutions: Partial Differential Equations of the Second Order. 1964.
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