TY  - BOOK
AU  - Conference on "Differential Equations", The Netherlands, August 26-31, 1979
AU  - Martini, R.
TI  - Geometrical approaches to differential equations: ; proceedings of the fourth scheveningen conference 
U1  - 515.35 
PY  - 1980///
CY  - Berlin
PB  - Springer-Verlag
ER  -