@article{AL_2020_59_5_a5,
     author = {N. A. Bazhenov and M. Mustafa and S. S. Ospichev and M. M. Yamaleev},
     title = {Numberings in the analytical hierarchy},
     journal = {Algebra i logika},
     pages = {594--599},
     publisher = {mathdoc},
     volume = {59},
     number = {5},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2020_59_5_a5/}
}