The Entropy of Nonrotating Isolated Horizons in Lovelock Theory from   Loop Quantum Gravity
  In this paper, the BF theory method is applied to the nonrotating isolated horizons in Lovelock theory. The final entropy matches the Wald entropy formula for this theory. We also confirm the conclusion got by Bodendorfer et. al. that the entropy is related to the flux operator rather than the area operator in general diffeomorphic-invariant theory. 
Jingbo Wang, Chao-Guang Huang, Lin Li
gr-qc