Black Hole in Higher Curvature Gravity and AdS/CFT Correspondence
  The classical central charge for the higher curvature gravity in 3-dimensions is calculated using the Legendre transformation method. The statistical entropy of BTZ black hole is derived by the Cardy's formula and the result completely coincides with the Iyer-Wald formula for the geometrical entropy. This coincidence suggests the generalized AdS/CFT correspondence. 
Hiromi Saida, Jiro Soda