@article{IVM_2005_7_a7,
     author = {Yu. T. Sil'chenko},
     title = {Semigroups with nondensely defined generating operator},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {57--62},
     publisher = {mathdoc},
     number = {7},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2005_7_a7/}
}