TY  - BOOK
AU  - Gould,S.H
TI  - Variational methods for eigenvalue problems : an introduction to the methods of rayleigh, ritz, weinstein, and aronszajn
SN  - 0-486-68712-0
CY  - New York
KW  - Calculus of variations
KW  - Differential equations
KW  - Mathematics
KW  - Vibration
N1  - Includes bibliographical references and index
ER  -