@article{AL_2020_59_1_a3,
     author = {I. Sh. Kalimullin and V. G. Puzarenko and M. Kh. Faizrakhmanov},
     title = {Computable positive and {Friedberg} numberings in hyperarithmetic},
     journal = {Algebra i logika},
     pages = {66--83},
     publisher = {mathdoc},
     volume = {59},
     number = {1},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2020_59_1_a3/}
}