On the Entropy of Minimally Coupled and Non-minimally Coupled Gravities
  We investigate whether the gravitational thermodynamic properties of the scalar-tensor theory of gravity are affected by the conformal transformation or not. As an explicit example, we consider an electrically charged static spherical black hole in the 4-dimensional low energy effective theory of bosonic string. 
Jeongwon Ho, Yongduk Kim and Young-Jai Park