@article{IVM_2000_3_a9,
     author = {V. E. Fedorov},
     title = {Degenerate strongly continuous groups of operators},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {54--65},
     publisher = {mathdoc},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2000_3_a9/}
}