@article{MP_2004_a3,
     author = {B. A. Rozenfel'd and E. M. \`El'kina},
     title = {{\CYRP}{\cyra}{\cyrm}{\cyrya}{\cyrt}{\cyri} {{\CYRZ}.\,{\CYRA}.~{\CYRS}{\cyrk}{\cyro}{\cyrp}{\cyre}{\cyrc}{\cyra}}},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {15--19},
     publisher = {mathdoc},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2004_a3/}
}