On The Finite Temperature Chern-Simons Coefficient
  We compute the exact finite temperature effective action in a 0+1-dimensional field theory containing a topological Chern-Simons term, which has many features in common with 2+1-dimensional Chern-Simons theories. This exact result explains the origin and meaning of puzzling temperature dependent coefficients found in various naive perturbative computations in the higher dimensional models. 
Gerald Dunne, Kimyeong Lee and Changhai Lu