@article{MP_2014_a6,
     author = {G. A. Gal'perin},
     title = {{\CYRB}{\cyri}{\cyrl}{\cyrsftsn}{\cyrya}{\cyrr}{\cyrd}{\cyrn}{\cyrery}{\cyre} {\cyrsh}{\cyra}{\cyrr}{\cyrery} {\cyrv}{\cyrery}{\cyrch}{\cyri}{\cyrs}{\cyrl}{\cyrya}{\cyryu}{\cyrt} $\pi$},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {180--204},
     publisher = {mathdoc},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2014_a6/}
}