1. A. Borel andHarish-Chandra, Arithmetic subgroups of algebraic groups,Ann. of Math.,75 (1962), 485–535.
2. N. Bourbaki,Groupes et Algébres de Lie, Ch. I–III, Hermann, Paris, 1971.
3. N. Bourbaki,Groupes et Algébres de Lie, Ch. VII, VIII, Hermann, Paris, 1975.
4. A. Connes, A factor of type II1 with countable fundamental group.J. Operator Theory,4 (1980), 151–153.
5. A. Connes, J. Feldman andB. Weiss, An amenable equivalence relation is generated by a single transformation,Ergod. Theory & Dynam. Sys.,1 (1981), 431–450.