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@article{IVM_1969_1_a13, author = {Yu. L. Shmul'yan}, title = {Linear fractional transformations of the upper half plane of operators}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {97--105}, publisher = {mathdoc}, number = {1}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1969_1_a13/} }
Yu. L. Shmul'yan. Linear fractional transformations of the upper half plane of operators. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1969), pp. 97-105. http://geodesic.mathdoc.fr/item/IVM_1969_1_a13/