@article{AL_2015_54_2_a0,
     author = {N. A. Bazhenov},
     title = {The branching theorem and computable categoricity in the {Ershov} hierarchy},
     journal = {Algebra i logika},
     pages = {137--157},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2015_54_2_a0/}
}