@article{MT_2020_23_2_a1,
     author = {I. S. Borisov and E. I. Shefer},
     title = {{\CYRA}{\cyrs}{\cyri}{\cyrm}{\cyrp}{\cyrt}{\cyro}{\cyrt}{\cyri}{\cyrk}{\cyra} {\cyrr}{\cyra}{\cyrs}{\cyrp}{\cyrr}{\cyre}{\cyrd}{\cyre}{\cyrl}{\cyre}{\cyrn}{\cyri}{\cyrya} {\cyrv}{\cyrr}{\cyre}{\cyrm}{\cyre}{\cyrn}{\cyri} {\cyrp}{\cyrr}{\cyre}{\cyrb}{\cyrery}{\cyrv}{\cyra}{\cyrn}{\cyri}{\cyrya} {\cyrs}{\cyrl}{\cyru}{\cyrch}{\cyra}{\cyrishrt}{\cyrn}{\cyro}{\cyrg}{\cyro} {\cyrb}{\cyrl}{\cyru}{\cyrzh}{\cyrd}{\cyra}{\cyrn}{\cyri}{\cyrya} {\cyrv} {\cyro}{\cyrb}{\cyrl}{\cyra}{\cyrs}{\cyrt}{\cyri} {\cyru}{\cyrm}{\cyre}{\cyrr}{\cyre}{\cyrn}{\cyrn}{\cyro} {\cyrb}{\cyro}{\cyrl}{\cyrsftsn}{\cyrsh}{\cyri}{\cyrh} {\cyru}{\cyrk}{\cyrl}{\cyro}{\cyrn}{\cyre}{\cyrn}{\cyri}{\cyrishrt}},
     journal = {Matemati\v{c}eskie trudy},
     pages = {50--69},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2020_23_2_a1/}
}