TY  - JOUR
AU  - Peter J. Olver
AU  - Juha Pohjanpelto
AU  - Francis Valiquette
TI  - On the Structure of Lie Pseudo-Groups
JO  - Symmetry, integrability and geometry: methods and applications
PY  - 2009
VL  - 5
UR  - http://geodesic.mathdoc.fr/item/SIGMA_2009_5_a76/
LA  - en
ID  - SIGMA_2009_5_a76
ER  -