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@article{CM_1993__85_1_99_0, author = {Saito, Hiroshi}, title = {On {Tunnell{\textquoteright}s} formula for characters of $GL(2)$}, journal = {Compositio Mathematica}, pages = {99--108}, publisher = {Kluwer Academic Publishers}, volume = {85}, number = {1}, year = {1993}, mrnumber = {1199206}, zbl = {0795.22009}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CM_1993__85_1_99_0/} }
Saito, Hiroshi. On Tunnell’s formula for characters of $GL(2)$. Compositio Mathematica, Tome 85 (1993) no. 1, pp. 99-108. http://geodesic.mathdoc.fr/item/CM_1993__85_1_99_0/