Operator k-theory for the group SU(n, 1). Pierre Julg; Gennadi Kasparov — 1995 Journal für die reine und angewandte Mathematik
Operator K -theory for groups which act properly and isometrically on Hilbert space. Higson, Nigel; Kasparov, Gennadi — 1997 Electronic Research Announcements of the American Mathematical Society [electronic only]