@article{FAA_1990_24_2_a10,
     author = {M. Ya. Zhitomirskii},
     title = {Normal forms of germs of two-dimensional distributions in $\mathbb{R}^4$},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {81--82},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1990_24_2_a10/}
}