M. C. Bento, Anjan A. Sen, Orfeu Bertolami|Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields|2002
M. C. Bento, Anjan A. Sen, Orfeu Bertolami|Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields|2003
M. C. Bento, Anjan A. Sen, Orfeu Bertolami|Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology|2004