@article{FAA_1987_21_3_a6,
     author = {Ya. M. Eliashberg},
     title = {A theorem on the structure of wave fronts and its applications in symplectic topology},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {65--72},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1987_21_3_a6/}
}