TY  - BOOK
AU  - Yourgrau, Wolfgang
AU  - Mandelstan, Stanley
TI  - Variational principles in dynamics and quantum theory
T2  - Dover books on physics and chemistry
SN  - 0486637735
U1  - 530.1 
PY  - 1979///
CY  - New York
PB  - Dover Publications
KW  - Física matemática
KW  - Theories and mathematical physics
ER  -