@article{AL_1982_21_4_a5,
     author = {V. L. Selivanov},
     title = {The structure of degrees of generalized index sets},
     journal = {Algebra i logika},
     pages = {472--491},
     publisher = {mathdoc},
     volume = {21},
     number = {4},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1982_21_4_a5/}
}