@article{IVM_2011_8_a9,
     author = {A. G. Chshiev},
     title = {The closeness and closability criteria for infinitesimal operators of certain semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {77--85},
     publisher = {mathdoc},
     number = {8},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2011_8_a9/}
}