@article{paperid:1105781, author = {Afshar, Hamid Reza and محسن علیشاهیها and علی ناصح}, title = {Three dimensional bigravity}, journal = {Physical Review D - Particles, Fields, Gravitation and Cosmology}, year = {2010}, volume = {81}, number = {4}, month = {February}, issn = {1550-7998}, keywords = {Bi-gravity}, }