@article{10_21136_CMJ_1989_102331,
     author = {Fam, Van At},
     title = {{\CYRO}{\cyrp}{\cyrr}{\cyre}{\cyrd}{\cyre}{\cyrl}{\cyre}{\cyrn}{\cyri}{\cyre} {\cyrn}{\cyra}{\cyri}{\cyrb}{\cyro}{\cyrl}{\cyrsftsn}{\cyrsh}{\cyre}{\cyrg}{\cyro} {\cyrs}{\cyro}{\cyrb}{\cyrs}{\cyrt}{\cyrv}{\cyre}{\cyrn}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrz}{\cyrn}{\cyra}{\cyrch}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyri} {\cyrs}{\cyro}{\cyro}{\cyrt}{\cyrv}{\cyre}{\cyrt}{\cyrs}{\cyrt}{\cyrv}{\cyru}{\cyryu}{\cyrshch}{\cyre}{\cyrg}{\cyro} {\cyrs}{\cyro}{\cyrb}{\cyrs}{\cyrt}{\cyrv}{\cyre}{\cyrn}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrv}{\cyre}{\cyrk}{\cyrt}{\cyro}{\cyrr}{\cyra} {\cyrn}{\cyre}{\cyro}{\cyrt}{\cyrr}{\cyri}{\cyrc}{\cyra}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyrh} {\cyrm}{\cyra}{\cyrt}{\cyrr}{\cyri}{\cyrc} {\cyrs}{\cyrt}{\cyre}{\cyrp}{\cyre}{\cyrn}{\cyrn}{\cyrery}{\cyrm} {\cyrm}{\cyre}{\cyrt}{\cyro}{\cyrd}{\cyro}{\cyrm}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {585--588},
     publisher = {mathdoc},
     volume = {39},
     number = {4},
     year = {1989},
     doi = {10.21136/CMJ.1989.102331},
     mrnumber = {1017990},
     zbl = {0696.65032},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1989.102331/}
}