@misc{DE_1977_13_5_a23,
     title = {Nikolaǐ {Pavlovi\v{c}} {Erugin} (on the occasion of his seventieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {961--962},
     year = {1977},
     volume = {13},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_5_a23/}
}