TY  - JOUR
AU  - Ian M. Anderson
AU  - Juha Pohjanpelto
TI  - Variational principles for differential equations with symmetries and conservation laws. II. Polynomial differential equations.
JO  - Mathematische Annalen
PY  - 1995
SP  - 627
EP  - 654
VL  - 301
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1995__301_4_165312/
ID  - MAN_1995__301_4_165312
ER  -