TY  - BOOK
AU  - Hermann, Robert.
TI  - Differential geometry and the calculus of variations
U1  - 516.7 HER 
PY  - 1968///
CY  - New York
PB  - Academic Press
KW  - Geometry, Differential
KW  - Calculus of variations
N1  - Includes bibliographical references (p. 431-433)
ER  -