Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MT_1982_2_a5, author = {V. L. Selivanov}, title = {Index sets in the {Kleene--Mostowski} hierarchy}, journal = {Matemati\v{c}eskie trudy}, pages = {135--158}, publisher = {mathdoc}, volume = {2}, year = {1982}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MT_1982_2_a5/} }
V. L. Selivanov. Index sets in the Kleene--Mostowski hierarchy. Matematičeskie trudy, Tome 2 (1982), pp. 135-158. http://geodesic.mathdoc.fr/item/MT_1982_2_a5/