TY  - JOUR
AU  - Oana Constantinescu
TI  - Formal integrability for the nonautonomous case of the inverse problem of the calculus of variations
JO  - Symmetry, integrability and geometry: methods and applications
PY  - 2012
VL  - 8
UR  - http://geodesic.mathdoc.fr/item/SIGMA_2012_8_a58/
LA  - en
ID  - SIGMA_2012_8_a58
ER  -