@article{IVM_1981_11_a10,
     author = {N. R. Bukharaev},
     title = {{\CYRR}-{\cyrg}-simple sets, {{\CYRF}{\CYRM}} sets and their degrees of unsolvability},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {69--71},
     year = {1981},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1981_11_a10/}
}