@article{IVM_1959_4_a17,
     author = {L. A. Sakhnovich},
     title = {A~study of the {\textquotedblleft}triangular form{\textquotedblright} of non-selfadjoint operators},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {141--149},
     year = {1959},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1959_4_a17/}
}