TY  - BOOK
TI  - Calculus of variations and its applications
SN  - 9780821892237 (online)
PY  - 1958///
CY  - New York
PB  - McGraw-Hill
UR  - http://www.ams.org/psapm/008 | http://dx.doi.org/10.1090/psapm/008
ER  -