TY  - JOUR
AU  - V. I. Arnol'd
TI  - Topological properties of Legendre projections in contact geometry of wave fronts
JO  - Algebra i analiz
PY  - 1994
SP  - 1
EP  - 16
VL  - 6
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AA_1994_6_3_a0/
LA  - ru
ID  - AA_1994_6_3_a0
ER  -