@article{DE_1987_23_1_a0,
     author = {N. P. Erugin and V. S. Korolyuk and O. B. Lukova},
     title = {Yuriǐ {Alekseevich} {Mitropol'skiǐ} (on the occasion of his seventieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {3--9},
     year = {1987},
     volume = {23},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_1_a0/}
}