%0 Journal Article %A S. R. Treil' %T An inverse spectral problem for the modulus of the Hankel operator, and balanced realizations %J Algebra i analiz %D 1990 %P 158-182 %V 2 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_1990_2_2_a7/ %G ru %F AA_1990_2_2_a7