@article{FAA_1988_22_3_a16,
     author = {S. L. Tabachnikov},
     title = {Computation of the {Bennequin} invariant of a {Legendre} curve from the geometry of its front},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {89--90},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1988_22_3_a16/}
}