Gravitational Chern-Simons Lagrangians and black hole entropy
  We analyze the problem of defining the black hole entropy when Chern-Simons terms are present in the action. Extending previous works, we define a general procedure, valid in any odd dimensions both for purely gravitational CS terms and for mixed gauge-gravitational ones. The final formula is very similar to Wald's original formula valid for covariant actions, with a significant modification. Notwithstanding an apparent violation of covariance we argue that the entropy formula is indeed covariant. 
Loriano Bonora, Maro Cvitan, Predrag Dominis Prester, Silvio Pallua,   Ivica Smoli\'c
hep-th gr-qc