@article{MI_1976__39_189357,
     author = {{\CYRA}.{\CYRM}. {\CYRCH}{\cyre}{\cyrb}{\cyra}{\cyrn}},
     title = {$B_r$- {\cyrl}{\cyru}{\cyrp}{\cyrery}},
     journal = {Matemati\v{c}eskie issledovani\^a},
     pages = {226--229},
     publisher = {mathdoc},
     volume = {39},
     year = {1976},
     zbl = {0375.20058},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MI_1976__39_189357/}
}