%0 Journal Article %A A. B. Aleksandrov %A V. V. Peller %T Functions of perturbed pairs of non-commuting contractions %J Izvestiya. Mathematics %D 2020 %P 659-682 %V 84 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2020_84_4_a2/ %G en %F IM2_2020_84_4_a2