@article{IM2_1980_15_1_a3,
     author = {A. S. Mishchenko and A. T. Fomenko},
     title = {The index of elliptic operators over $C^*$-algebras},
     journal = {Izvestiya. Mathematics },
     pages = {87--112},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1980_15_1_a3/}
}