TY  - BOOK
AU  - Christodoulou,Demetrios
TI  - The action principle and partial differential equations
SN  - 0691049564 (cloth : alk. paper)
PY  - 2000///
CY  - Princeton, N.J.
PB  - Princeton University Press
KW  - Differential equations, Hyperbolic
KW  - Symplectic manifolds
N1  - Includes bibliographical references (315-316)
ER  -