@article{MT_1982_2_a5,
     author = {V. L. Selivanov},
     title = {Index sets in the {Kleene{\textendash}Mostowski} hierarchy},
     journal = {Matemati\v{c}eskie trudy},
     pages = {135--158},
     year = {1982},
     volume = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_1982_2_a5/}
}