@article{MZM_1972_12_2_a14,
     author = {I. Kh. Sabitov},
     title = {Formal solutions of the {Hilbert} problem for a ring},
     journal = {Matemati\v{c}eskie zametki},
     pages = {221--232},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1972_12_2_a14/}
}