@article{VNGU_2010_10_4_a8,
     author = {S. S. Ospichev},
     title = {Some {Properties} of {Numberings} in {Various} {Levels} in {Ershov's} {Hierarchy}},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {125--132},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2010_10_4_a8/}
}