Equivariant Eilenberg MacLane spaces K(..., 1) for possibly non-connected or empty fixed point sets. Wolfgang Lück (1987) Manuscripta mathematica
Equivariant Euler characteristics and K -homology Euler classes for proper cocompact G -manifolds. Lück, Wolfgang, Rosenberg, Jonathan (2003) Geometry & Topology
Equivariant Frame Fields on Spheres with complementary equivariant complex structures. Thurgut Önder (1995) Manuscripta mathematica
Equivariant orientation theory. Costenoble, S.R., May, J.P., Waner, S. (2001) Homology, Homotopy and Applications