@article{FAA_1989_23_1_a11,
     author = {M. Ya. Zhitomirskii},
     title = {Singularities and normal forms of odd-dimensional {Pfaff} equations},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {70--71},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1989_23_1_a11/}
}