1. C. de Rham, G. Gabadadze and A.J. Tolley, Resummation of Massive Gravity, Phys. Rev. Lett. 106 (2011) 231101 [ arXiv:1011.1232 ] [ INSPIRE ].
2. A. Nicolis, R. Rattazzi and E. Trincherini, The Galileon as a local modification of gravity, Phys. Rev. D 79 (2009) 064036 [ arXiv:0811.2197 ] [ INSPIRE ].
3. C. de Rham, G. Gabadadze, L. Heisenberg and D. Pirtskhalava, Cosmic Acceleration and the Helicity-0 Graviton, Phys. Rev. D 83 (2011) 103516 [ arXiv:1010.1780 ] [ INSPIRE ].
4. G. D’Amico et al., Massive Cosmologies, Phys. Rev. D 84 (2011) 124046 [ arXiv:1108.5231 ] [ INSPIRE ].
5. K. Koyama, G. Niz and G. Tasinato, Strong interactions and exact solutions in non-linear massive gravity, Phys. Rev. D 84 (2011) 064033 [ arXiv:1104.2143 ] [ INSPIRE ].