@article{DE_1973_9_5_a26,
     author = {N. P. Erugin and S. M. Nikol'skii and G. N. Yakovlev},
     title = {Lev {Dmitrievi{\v{c}}} {Kudrjavcev} (on his fiftieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {969--973},
     publisher = {mathdoc},
     volume = {9},
     number = {5},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_5_a26/}
}