@article{IVM_2010_12_a5,
     author = {M. Kh. Faizrakhmanov},
     title = {Decomposability of low 2-computably enumerable degrees and {Turing} jumps in the {Ershov} hierarchy},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {58--66},
     publisher = {mathdoc},
     number = {12},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2010_12_a5/}
}