%0 Journal Article %A I. M. Spitkovsky %T Some estimates for the partial indices of measurable matrix-valued functions %J Sbornik. Mathematics %D 1981 %P 207-226 %V 39 %N 2 %U http://geodesic.mathdoc.fr/item/SM_1981_39_2_a3/ %G en %F SM_1981_39_2_a3