%0 Journal Article %A T. Ehrhardt %A I. M. Spitkovsky %T Factorization of piecewise constant matrix functions and systems of linear differential equations %J Algebra i analiz %D 2001 %P 56-123 %V 13 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_2001_13_6_a1/ %G ru %F AA_2001_13_6_a1