@article{IM2_1987_29_1_a11,
     author = {E. V. Troitskii},
     title = {The equivariant index of $C^*$-elliptic operators},
     journal = {Izvestiya. Mathematics },
     pages = {207--224},
     publisher = {mathdoc},
     volume = {29},
     number = {1},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1987_29_1_a11/}
}