@article{SM_1978_34_5_a6,
     author = {B. V. Fedosov and M. A. Shubin},
     title = {The index of random elliptic {operators.~I}},
     journal = {Sbornik. Mathematics},
     pages = {671--699},
     year = {1978},
     volume = {34},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1978_34_5_a6/}
}