@article{DAN_1976_229_5_a7,
     author = {I. M. Spitkovsky},
     title = {On partial indices of continuous matrix-valued functions},
     journal = {Doklady Akademii Nauk},
     pages = {1059--1062},
     publisher = {mathdoc},
     volume = {229},
     number = {5},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_229_5_a7/}
}