Automorphic representations and Lefschetz numbers Jürgen Rohlfs; Birgit Speh — 1989 Annales scientifiques de l'École Normale Supérieure
Representations with cohomology in the discrete spectrum of subgroups of SO ( n , 1 ) ( Z ) and Lefschetz numbers Jürgen Rohlfs; Birgit Speh — 1987 Annales scientifiques de l'École Normale Supérieure