Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1971_10_3_a3, author = {S. Kallibekov}, title = {Index sets of degrees of unsolvability}, journal = {Algebra i logika}, pages = {316--326}, publisher = {mathdoc}, volume = {10}, number = {3}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1971_10_3_a3/} }
S. Kallibekov. Index sets of degrees of unsolvability. Algebra i logika, Tome 10 (1971) no. 3, pp. 316-326. http://geodesic.mathdoc.fr/item/AL_1971_10_3_a3/