%0 Journal Article %A V. E. Markevich %T Moving singularities of a system of two second-order differential equations %J Differencialʹnye uravneniâ %D 1979 %P 553-554 %V 15 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_3_a20/ %G ru %F DE_1979_15_3_a20