@article{MI_1980__54_189520,
     author = {{\CYRI}.{\CYREREV}. {\CYRV}{\cyre}{\cyrr}{\cyrb}{\cyri}{\cyrc}{\cyrk}{\cyri}{\cyrishrt} and {\CYRN}.{\CYRYA}. {\CYRK}{\cyrr}{\cyru}{\cyrp}{\cyrn}{\cyri}{\cyrk}},
     title = {[unknown]},
     journal = {Matemati\v{c}eskie issledovani\^a},
     pages = {21--35},
     publisher = {mathdoc},
     volume = {54},
     year = {1980},
     zbl = {0451.47067},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MI_1980__54_189520/}
}