@article{DAN_1985_284_1_a13,
     author = {I. M. Spitkovsky},
     title = {Szeg{\H o} limit theorems in the case of a matrix locally sectorial symbol},
     journal = {Doklady Akademii Nauk},
     pages = {61--65},
     publisher = {mathdoc},
     volume = {284},
     number = {1},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_284_1_a13/}
}