TY  - BOOK
AU  - Reichel,W
TI  - Uniqueness theorems for variational problems by the method of transformation groups
T2  - Lecture notes in mathematics 1841
SN  - 9783540218395
U1  - 8.05+4.13 
PY  - 2004///
CY  - Berlin
PB  - Springer
ER  -