El' sgol' tsl, L E

Calculus of variations / L E El' sog'ts, L E. - - Reading, Mass., : Addison-Wesley Pub., Co., [1962, 1961] - 178 p. : illus. - - (international series of monographs on pure and applied mathematics, v. 19). .


Calculus of variations.

QA315 / E513