TY  - BOOK
AU  - Sagan, Hans
TI  - Introduction to the calculus of variations
SN  - 9780486673660
SN  - 92002356
U1  - 515.64 SAG 
PY  - 1992///
CY  - Mineola, NY
PB  - Dover Publications
KW  - Calculus of variations
N1  - Originally published: New York : McGraw-Hill, 1969, in series: International series in pure and applied mathematics. Includes bibliographical references (p. 434-437) and index
ER  -