TY  - BOOK
AU  - Lavrent'ev M A
AU  - Radok J R M
TI  - Variational methods for boundary value problems for systems of elliptic equations
U1  - 515.64 
PY  - 1963///
CY  - Groningen
PB  - P Noordhoff
KW  - Boundary value problems
KW  - Calculus
KW  - Elliptic systems
ER  -