@article{AL_2003_42_6_a6,
     author = {Zh. T. Talasbaeva},
     title = {Positive {Numberings} of {Families} of {Sets} in the {Ershov} {Hierarchy}},
     journal = {Algebra i logika},
     pages = {737--746},
     year = {2003},
     volume = {42},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2003_42_6_a6/}
}