1. Noncommutative Geometry;Connes,1994
2. Cyclic cohomology and Novikov conjecture and hyperbolic groups;Connes;Topology,1990
3. Asymptotic invariants of infinite groups;Gromov,1993
4. P. de la Harpe, Groupes hyperboliques, algèbres d'opérateurs et un théorème de Jolissaint, C. R. Acad. Sci. Paris, Sér. 1, 307 (1988) 771–774.
5. Smooth dense subalgebras of reduced group C*-Algebras, Schwartz cohomology of groups and cyclic cohomology;Ji;J. Funct. Anal.,1992