@article{IVM_1994_1_a1,
     author = {Sh. T. Ishmukhametov},
     title = {On decomposition of the $0'$ degree into lesser $T$-degrees containing differences of recursively enumerable sets.},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {12--16},
     year = {1994},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1994_1_a1/}
}