%0 Journal Article %A Arthur, James %T Endoscopic $L$ -Functions and a Combinatorial Identity %J Canadian journal of mathematics %D 1999 %P 1135-1148 %V 51 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1999-050-x/ %R 10.4153/CJM-1999-050-x %F 10_4153_CJM_1999_050_x