- 
								[1]
								
J. P. Uzan, Living Rev. Rel., 14: 2 (2011)
 - 
								[2]
								
T. Damour and F. J. Dyson, Nucl. Phys. B, 480: 37 (1996)
 - 
								[3]
								
Y. V. Petrov, A. I. Nazarov, M. S. Onegin, V. Y. Petrov, and E. G. Sakhnovsky, Phys. Rev. C, 74: 064610 (2006)
 - 
								[4]
								
C. R. Gould, E. I. Sharapov, and S. K. Lamoreaux, Phys. Rev. C, 74: 024607 (2006)
 - 
								[5]
								
T. Rosenband et al, Science, 319: 1808 (2008)
 - 
								[6]
								
P. A. R. Ade et al, (Planck Collaboration), Astron. Astrophys., 571: A16 (2014)
 - 
								[7]
								
J. K. Webb et al, Phys. Rev. Lett., 107: 191101 (2011)
 - 
								[8]
								
J. A. King et al, Mon. Not. R. Astron. Soc., 422: 3370 (2012)
 - 
								[9]
								
A. M. M. Pinho, C. J. A. P. Martins, Phys. Lett. B, 756: 121 (2016)
 - 
								[10]
								
P. Molaro et al, Astron. Astrophys., 555: A68 (2013)
 - 
								[11]
								
T. M. Evans et al, Mon. Not. Roy. Astron. Soc., 445: 128 (2014)
 - 
								[12]
								
J. B. Whitmore and M. T. Murphy, Mon. Not. Roy. Astron. Soc., 447: 446 (2015)
 - 
								[13]
								
M. C. Ferreira, O. Frigola, C. J. A. P. Martins, A. M. R. V. L. Monteiro, and J. Sola, Phys. Rev. D, 89: 083011 (2014)
 - 
								[14]
								
A. Songaila, and L. Cowie, Astrophys. J., 793: 103 (2014)
 - 
								[15]
								
P. Molaro, D. Reimers, I. I. Agafonova, and S. A. Levshakov, Eur. Phys. J. ST, 163: 173 (2008)
 - 
								[16]
								
H. Chand, R. Srianand, P. Petitjean, B. Aracil, R. Quast, and D. Reimers, Astron. Astrophys., 451: 45 (2006)
 - 
								[17]
								
I. I. Agafonova, P. Molaro, S. A. Levshakov, and J. L. Hou, Astron. Astrophys., 529: A28 (2011)
 - 
								[18]
								
E. J. Copeland, M. Sami, and S. Tsujikawa, Int. J. Mod. Phys. D, 15: 1753 (2006)
 - 
								[19]
								
C. J. A. P. Martins, A. M. M. Pinho, P. Carreira, A. Gusart, J. Lopez, and C. I. S. A. Rocha, Phys. Rev. D., 93: 023506 (2016)
 - 
								[20]
								
I. Antoniou and L. Perivolaropoulos, JCAP, 1012: 012 (2012)
 - 
								[21]
								
A. Mariano and L. Perivolaropoulos, Phys. Rev. D, 86: 083517 (2012)
 - 
								[22]
								
X. Li, H.-N. Lin, S. Wang, and Z. Chang, Eur. Phys. J. C, 75: 181 (2015)
 - 
								[23]
								
D. Bao, S. S. Chern, and Z. Shen, An Introduction to Riemann-Finsler Geometry, Graduate Texts in Mathematics 200, Springer, New York, 2000
 - 
								[24]
								
S. A. Levshakov, I. I. Agafonova, P. Molaro, and D. Reimers, Mem. Soc. Astron. Ital., 80: 850, (2009)
 - 
								[25]
								
J. K. Webb et al, Physical Review Letters, 82: 884 (1999)
 - 
								[26]
								
G. Randers, Phys. Rev., 59: 195 (1941)
 - 
								[27]
								
X. Li and Z. Chang, Differ. Geom. Appl., 30: 737 (2012)
 - 
								[28]
								
X. Li and Z. Chang, Phys. Rev. D, 90: 064049 (2014)
 - 
								[29]
								
K. Rosquist and R. T. Jantzen, Phys. Rep., 166: 89 (1988)
 - 
								[30]
								
T. Koivisto and D. F. Mota, JCAP, 0806: 018 (2008)
 - 
								[31]
								
L. Campanelli, P. Cea, G. L. Fogli, and A. Marrone, Phys. Rev. D, 83: 103503 (2011)
 - 
								[32]
								
X. Li, M.-H. Li, H.-N. Lin, and Z. Chang, Mon. Not. R. Astron. Soc., 428: 2939 (2013)
 - 
								[33]
								
H. Akbar-Zadeh. Acad. Roy. Belg. Bull. Cl. Sci., 74: 281 (1988)
 - 
								[34]
								
P. A. R. Ade et al, (Planck Collaboration), Astron. Astrophys., 561: A97 (2014)
 - 
								[35]
								
N. Suzuki et al, Astrophys. J., 746: 85 (2012)
 - 
								[36]
								
H.-N. Lin, S. Wang, Z. Chang, and X. Li, Mon. Not. R. Astron. Soc., 456: 1881 (2016)
 - 
								[37]
								
R. Amanullah et al, Astrophys. J., 716: 712 (2010)
 - 
								[38]
								
M. Betoule et al, Astron. Astrophys., 568: A22 (2014)
 - 
								[39]
								
Z. Chang and H.-N. Lin, Mon. Not. R. Astron. Soc., 428: 2939 (2013)