Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
S. M. Grudskii. Matrix singular integral operators with infinite index.~II. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 6 (1991), pp. 69-72. http://geodesic.mathdoc.fr/item/IVM_1991_6_a13/