@article{DE_1975_11_4_a3,
     author = {R. \`E. Vinograd},
     title = {On a problem of {N.} {P.} {Erugin}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {632--638},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_4_a3/}
}