@article{AA_2000_12_3_a5,
     author = {V. E. Fedorov},
     title = {Degenerate strongly continuous semigroups of operators},
     journal = {Algebra i analiz},
     pages = {173--200},
     year = {2000},
     volume = {12},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2000_12_3_a5/}
}