%0 Journal Article %A I. M. Spitkovsky %T Factorization of measurable matrix-valued functions and related problems in the theory of systems of singular integral equations and the vector Riemann boundary %J Differencialʹnye uravneniâ %D 1981 %P 697-709 %V 17 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1981_17_4_a14/ %G ru %F DE_1981_17_4_a14