@article{KVANT_2009_3_a8,
     author = {A. Spivak},
     title = {{\CYRF}{\cyro}{\cyrr}{\cyrm}{\cyru}{\cyrl}{\cyra} {\cyrk}{\cyrr}{\cyryu}{\cyrk}{\cyro}{\cyrv}},
     journal = {Kvant},
     pages = {44--47},
     publisher = {mathdoc},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KVANT_2009_3_a8/}
}