%0 Journal Article %A Yu. A. Neretin %T Spectral data for a~pair of matrices of order three and an action of the group $\mathrm{GL}(2,\mathbb Z)$ %J Izvestiya. Mathematics %D 2011 %P 959-969 %V 75 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2011_75_5_a4/ %G en %F IM2_2011_75_5_a4