TY  - DATA
AU  - Cox, Steven J.
AU  - Hardt, R.
TI  - Six themes on variation 
T2  - The Student Mathematical Library, 
SN  - 9781470421380 (online)
PY  - 2004///
CY  - Providence, RI
PB  - American Mathematical Society
KW  - Calculus of variations
N1  - Includes bibliographical references
UR  - https://doi.org/10.1090/stml/026
ER  -