%0 Journal Article %A N. P. Erugin %A V. S. Korolyuk %A O. B. Lukova %T Juriǐ Alekseevič Mitropol'skiǐ (on the occasion of his 60th birthday) %J Differencialʹnye uravneniâ %D 1977 %P 177-184 %V 13 %N 1 %U http://geodesic.mathdoc.fr/item/DE_1977_13_1_a26/ %G ru %F DE_1977_13_1_a26