%0 Journal Article %A V. M. Millionshchikov %T A certain dense set in a space of linear systems %J Differencialʹnye uravneniâ %D 1975 %P 755-757 %V 11 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1975_11_4_a20/ %G ru %F DE_1975_11_4_a20