Effective Matter Cosmologies of Massive Gravity I: Non-Physical Fluids
  For the massive gravity, after decoupling from the metric equation we find a broad class of solutions of the Stuckelberg sector by solving the background metric in the presence of a diagonal physical metric. We then construct the dynamics of the corresponding FLRW cosmologies which inherit effective matter contribution through the decoupling solution mechanism of the scalar sector. 
Nejat Tevfik Yilmaz
hep-th