@article{IVM_1987_12_a7,
     author = {I. B. Kozhukhov and M. Ya. Finkel'shtein},
     title = {Perfect and semiprimary subgroup rings},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {45--48},
     year = {1987},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1987_12_a7/}
}