@article{SM_1976_30_1_a1,
     author = {N. V. Beljakin},
     title = {Iterated {Kleene} computability and the superjump},
     journal = {Sbornik. Mathematics},
     pages = {17--37},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {1976},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1976_30_1_a1/}
}