TY  - JOUR
AU  - S. L. Tabachnikov
TI  - Computation of the Bennequin invariant of a Legendre curve from the geometry of its front
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1988
SP  - 89
EP  - 90
VL  - 22
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1988_22_3_a16/
LA  - ru
ID  - FAA_1988_22_3_a16
ER  -