Slow Roll Inflation in Non-Minimally Coupled Theories: Hyperextended   Gravity Approach
  The slow roll approximation is studied for cosmological models in Hyperextended Scalar-Tensor Theories of Gravity. A procedure to obtain slow roll solutions in non-minimally coupled gravity is outlined and some examples are provided. An integral condition over the functional form of the non-minimal coupling is imposed in order to obtain intermediate inflationary behavior. 
Diego F. Torres