Differential equations and the calculus of variations
[by] L. Elsgolts. Translated from the Russian by George Yankovsky.
APA Citation
Ėlʹsgolʹt︠s︡, L. Ė. (Lev Ėrnestovich). (1970). Differential equations and the calculus of variations. Moscow: Mir Publishers.
MLA Citation
Ėlʹsgolʹt︠s︡, L. Ė. (Lev Ėrnestovich). Differential Equations And the Calculus of Variations. Moscow: Mir Publishers, 1970.
Warning: These citations may not always be complete (especially for serials).