@article{FAA_1985_19_1_a12,
     author = {M. Ya. Zhitomirskii},
     title = {Finitely determined $1$-forms $w$, $w|_0\ne0$ are exhausted by the {Darboux} and {Martinet} models},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {71--72},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1985_19_1_a12/}
}