@article{AA_1991_3_3_a11,
     author = {A. L. Vol'berg},
     title = {J.~William {Helton.} {{\textquotedblleft}Operator} {Theory,} {Analytic} {Functions,} {Matrices,} and {Electrical} {Engineering{\textquotedblright}.} {CBMS} {Regional} {Conf.} {Series} in {Math.~N~68.} {American} {Math.} {Society,} 1987. 134~p.;},
     journal = {Algebra i analiz},
     pages = {216--222},
     year = {1991},
     volume = {3},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1991_3_3_a11/}
}