1. J. Arthur, A trace formula for reductive groups I, Duke Math. J. 45 (1978), 911–952.
2. J. Arthur, Eisenstein series and the trace formula, Proc. Symp. Pure Math. 33 (1979), Part 1, 253–274.
3. E. Borel Sur une application d’un théorème de M. Hadamard, Bull. Sci. Math. Sér. 2, 18 (1894), 22–25.
4. H. Braun, Zur Theorie der Hermitischen Formen, Abh. Math. Sem. Hamburg 14 (1941), 61–150.
5. W. Casselman, A new non-unitary argument for p-adic representations, J. Fac. of Science, Univ. of Tokyo, Sec. IA, Math. 28 (1982), 907–928.