@article{RM_1990_45_2_a15,
     author = {V. G. Zvyagin},
     title = {The degree of {Fredholm} maps equivariant with respect to the actions of the circle and the torus},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {229--230},
     publisher = {mathdoc},
     volume = {45},
     number = {2},
     year = {1990},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1990_45_2_a15/}
}