%0 Journal Article %A R. R. Mkrtumyan %T A third order linear differential equation %J Differencialʹnye uravneniâ %D 1978 %P 551-553 %V 14 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1978_14_3_a21/ %G ru %F DE_1978_14_3_a21