TY  - JOUR
AU  - H. Sato
TI  - Schwarzian derivatives of contact diffeomorphisms
JO  - Lobachevskii journal of mathematics
PY  - 1999
SP  - 89
EP  - 98
VL  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/LJM_1999_4_a4/
LA  - en
ID  - LJM_1999_4_a4
ER  -