TY  - JOUR
AU  - V. Yu. Ovsienko
TI  - A Lagrangian Schwarzian derivative
JO  - Vestnik Moskovskogo universiteta. Matematika, mehanika
PY  - 1989
SP  - 42
EP  - 45
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VMUMM_1989_6_a9/
LA  - ru
ID  - VMUMM_1989_6_a9
ER  -