Some Quantum Aspects of D=3 Space-Time Massive Gravity
  We discuss some features of Einstein-Proca gravity in D=3 and 4 space-times. Our study includes a discussion on the tree-level unitarity and on the issue of light deflection in 3D gravity in the presence of a mass term. 
Carlos Pinheiro, Gentil O. Pires and Fernando A. B. Rabelo de Carvalho