@article{RM_1972_27_4_a6,
     author = {M. F. Atiyah and I. M. Singer},
     title = {The index of elliptic operators. {IV}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {27},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1972_27_4_a6/}
}