@article{JSFU_2009_2_3_a2,
     author = {Vladimir I. Senashov},
     title = {{\CYRS}haracterizations of {Layer-Finite} {Groups} and {Their} {Extensions}},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {279--287},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2009_2_3_a2/}
}