Analytic Torsion on Hyperbolic Manifolds and the Semiclassical   Approximation for Chern-Simons Theory
  The invariant integration method for Chern-Simons theory for gauge group SU(2) and manifold \Gamma\H^3 is verified in the semiclassical approximation. The semiclassical limit for the partition function associated with a connected sum of hyperbolic 3-manifolds is presented. We discuss briefly L^2 - analytical and topological torsions of a manifold with boundary. 
A.A. Bytsenko, A.E. Goncalves and W. da Cruz