@article{RM_1964_19_1_a1,
     author = {I. Ts. Gokhberg},
     title = {A factorization problem in normed rings, functions of isometric and symmetric operators and singular integral equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {63--114},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1964},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1964_19_1_a1/}
}