@article{FAA_1971_5_2_a4,
     author = {B. V. Grigor'ev},
     title = {Characteristic classes of principal $G$-stratifications with coefficients belonging to sheafs of germs of differential forms},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {45--58},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1971_5_2_a4/}
}