Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1988_27_4_a5, author = {V. L. Selivanov}, title = {Ershov's hierarchy and $\rm T$-jumps}, journal = {Algebra i logika}, pages = {464--478}, publisher = {mathdoc}, volume = {27}, number = {4}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1988_27_4_a5/} }
V. L. Selivanov. Ershov's hierarchy and $\rm T$-jumps. Algebra i logika, Tome 27 (1988) no. 4, pp. 464-478. http://geodesic.mathdoc.fr/item/AL_1988_27_4_a5/