@article{IM2_1971_5_6_a8,
     author = {N. V. Panov},
     title = {Characteristic numbers in $U$-theory},
     journal = {Izvestiya. Mathematics},
     pages = {1365--1385},
     year = {1971},
     volume = {5},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_6_a8/}
}