Elsgolts, L., & Translated by George Yankovsky. (1977). Differential equations and the calculus of variations (1st Ed.). Moscow: Mir.
Chicago Style CitationElsgolts, L., and Translated by George Yankovsky. Differential Equations and the Calculus of Variations. 1st Ed. Moscow: Mir, 1977.
MLA CitationElsgolts, L., and Translated by George Yankovsky. Differential Equations and the Calculus of Variations. 1st Ed. Moscow: Mir, 1977.
Warning: These citations may not always be 100% accurate.