@article{IM_1989__96_1_143683,
     author = {V., Uribe, A. Guillemin},
     title = {Circular symmetry and the trace formula.},
     journal = {Inventiones mathematicae},
     pages = {385--424},
     publisher = {mathdoc},
     volume = {96},
     number = {1},
     year = {1989},
     zbl = {0686.58040},
     url = {http://geodesic.mathdoc.fr/item/IM_1989__96_1_143683/}
}