@article{IVM_2000_2_a1,
     author = {G. G. Amosov},
     title = {On the approximation of semigroups of isometries in {a~Hilbert} space},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {7--12},
     publisher = {mathdoc},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2000_2_a1/}
}