TY  - BOOK
AU  - Leipholz, H.
TI  - Direct variational methods and eigenvalue problems in engineering
SN  - 90 286 0106 6
U1  - 515.35 
PY  - 1977///
CY  - Leyden
PB  - Noordhoff Interational Publishing
N1  - Eigenvalue Problems -- Engineering 2.Boundary Value Problems
ER  -