@misc{MP_2009_a0,
     title = {{\CYRYA}.\,{\CYRS}.~{\CYRD}{\cyru}{\cyrb}{\cyrn}{\cyro}{\cyrv} (1887--1957)},
     journal = {Matematicheskoe Prosveshchenie},
     pages = {5--9},
     publisher = {mathdoc},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MP_2009_a0/}
}