@article{RM_1968_23_5_a6,
     author = {M. F. Atiyah and I. M. Singer},
     title = {The index of elliptic {operators.~I}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1968},
     volume = {23},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1968_23_5_a6/}
}