TY  - BOOK
AU  - Carathéodory,Constantin
AU  - Dean,Robert B.
AU  - Brandstatter,Julius J.
TI  - Calculus of variations and partial differntial equations of the first order
PY  - 1965///
CY  - San Francisco : 
PB  - Holden Day, 
KW  - Ecuaciones Diferenciales
ER  -