Elsgolts, L.
Differential Equations and the Calculus of Variations - Moscow Mir Pub. 1973 - 440
Differential Equations
Calculus of Variations
517.9 ELS
Differential Equations and the Calculus of Variations - Moscow Mir Pub. 1973 - 440
Differential Equations
Calculus of Variations
517.9 ELS