Elsgolts, L. (1970). Differential equations and the calculus of variations. Mir.
シカゴスタイル引用形Elsgolts, L. Differential Equations and the Calculus of Variations. Moscow: Mir, 1970.
MLA引用形式Elsgolts, L. Differential Equations and the Calculus of Variations. Mir, 1970.
警告: この引用は必ずしも正確ではありません.