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@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/} }
M. Ya. Zhitomirskii. Singularities and normal forms of odd-dimensional Pfaff equations. Funkcionalʹnyj analiz i ego priloženiâ, Tome 23 (1989) no. 1, pp. 70-71. http://geodesic.mathdoc.fr/item/FAA_1989_23_1_a11/