%0 Journal Article %A Alex Gamburd %A Dmitry Jakobson %A Peter Sarnak %T Spectra of elements in the group ring of $\mathrm{SU}(2)$ %J Journal of the European Mathematical Society %D 1999 %P 51-85 %V 1 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1007/pl00011157/ %R 10.1007/pl00011157 %F JEMS_1999_1_1_a3