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@article{JRAM_1987__379_152946, author = {Werner Hoffmann}, title = {The non-semi-simple term in the trace formula for rank one lattices.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {1--21}, publisher = {mathdoc}, volume = {379}, year = {1987}, zbl = {0609.22005}, url = {http://geodesic.mathdoc.fr/item/JRAM_1987__379_152946/} }
Werner Hoffmann. The non-semi-simple term in the trace formula for rank one lattices.. Journal für die reine und angewandte Mathematik, Tome 379 (1987), pp. 1-21. http://geodesic.mathdoc.fr/item/JRAM_1987__379_152946/