TY  - BOOK
AU  - Gould,S.
TI  - Variational methods for eigenvalue problems: an introduction to the Weinstein method of intermediate problems 
T2  - Mathematical expositions
U1  - 519.11 
PY  - 1957///
CY  - London
PB  - University of Toronto Press
KW  - ESTADISTICA MATEMATICA
ER  -