@article{ARM_1990__26_2-3_a6,
     author = {Izobov, N. A. and Stepanovich, O. P.},
     title = {O{\cyrb} {\cyri}{\cyrn}{\cyrv}{\cyra}{\cyrr}{\cyri}{\cyra}{\cyrn}{\cyrt}{\cyrn}{\cyro}{\cyrs}{\cyrt}{\cyri} {\cyrh}{\cyra}{\cyrr}{\cyra}{\cyrk}{\cyrt}{\cyre}{\cyrr}{\cyri}{\cyrs}{\cyrt}{\cyri}{\cyrch}{\cyre}{\cyrs}{\cyrk}{\cyri}{\cyrh} {\cyrp}{\cyro}{\cyrk}{\cyra}{\cyrz}{\cyra}{\cyrt}{\cyre}{\cyrl}{\cyre}{\cyrishrt} {\cyrl}{\cyri}{\cyrn}{\cyre}{\cyrishrt}{\cyrn}{\cyrery}{\cyrh} {\cyrs}{\cyri}{\cyrs}{\cyrt}{\cyre}{\cyrm} {\cyrp}{\cyrr}{\cyri} {\cyrerev}{\cyrk}{\cyrs}{\cyrp}{\cyro}{\cyrn}{\cyre}{\cyrn}{\cyrc}{\cyri}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro} {\cyru}{\cyrb}{\cyrery}{\cyrv}{\cyra}{\cyryu}{\cyrshch}{\cyri}{\cyrh} {\cyrv}{\cyro}{\cyrz}{\cyrm}{\cyru}{\cyrshch}{\cyre}{\cyrn}{\cyri}{\cyrya}{\cyrh}},
     journal = {Archivum mathematicum},
     pages = {107,108},
     publisher = {mathdoc},
     volume = {26},
     number = {2-3},
     year = {1990},
     mrnumber = {1188269},
     zbl = {0729.34030},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ARM_1990__26_2-3_a6/}
}