Second order equations with nonnegative characteristic form /

Bibliographic Details

Main Author:	Oleĭnik, O. A.
Other Authors:	Radkevich, E. V. (Evgeniĭ Vladimirovich)
Format:	Book
Language:	English Russian
Published:	Providence, R.I. : American Mathematical Society, [1973]
Subjects:	Differential equations, Partial. Boundary value problems.