@article{AL_2018_57_3_a5,
     author = {V. L. Selivanov and M. M. Yamaleev},
     title = {Turing degrees in refinements of the arithmetical hierarchy},
     journal = {Algebra i logika},
     pages = {338--361},
     publisher = {mathdoc},
     volume = {57},
     number = {3},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2018_57_3_a5/}
}