@article{JEMS_1999_1_1_a3,
     author = {Alex Gamburd and Dmitry Jakobson and Peter Sarnak},
     title = {Spectra of elements in the group ring of $\mathrm{SU}(2)$},
     journal = {Journal of the European Mathematical Society},
     pages = {51--85},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1999},
     doi = {10.1007/pl00011157},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/pl00011157/}
}