%0 Journal Article %T Konstantin Sergeevich Sibirskiǐ (on the occasion of his 60th birthday) %J Differencialʹnye uravneniâ %D 1988 %P 371-375 %V 24 %N 3 %U http://geodesic.mathdoc.fr/item/DE_1988_24_3_a0/ %G ru %F DE_1988_24_3_a0