@article{IVM_1991_6_a13,
     author = {S. M. Grudskii},
     title = {Matrix singular integral operators with infinite {index.~II}},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {69--72},
     publisher = {mathdoc},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1991_6_a13/}
}