TY  - BOOK
AU  - Griffiths,Phillip A.
TI  - Exterior differential systems and the calculus of variations
SN  - 3764331038
PY  - 1983///
CY  - Boston, MA.
PB  - Birkhauser
KW  - Calculus of variations
KW  - Exterior differential systems
N1  - Includes bibliographical references and index
ER  -