[1] Riess A G et al 1998 Astron. J. 116 1009

[2] Perlmutter S et al 1999 Astrophys. J. 517 565

[3] Padmanabhan T 2003 Phys. Rep. 380 235

Peebles P J E and Ratra B 2003 Rev. Mod. Phys. 75 559

[4] Zlatev I, Wang L and Steinhardt P J 1999 Phys. Rev. Lett.
82 896

Steinhardt P J, Wang L and Zlatev I 1999 it Phys. Rev. D
59 123504

[5] Caldwell R R 2003 Phys. Rev. Lett. 91 071301

[6] Feng B, Wang L M and Zhang X M 2005 Phys. Lett. B 607 1

[7] Chevallier M and Polarski D 2001 Int. J. Mod. Phys. D
10 213

Linder E V 2003 Phys. Rev. Lett. 90 091301

[8] Chiba T, Sugiyama N and Nakamura T 1998 Mon. Not. Roy.
Astron. Soc. London 301 72

[9] Liddle A R 2004 Mon. Not. Roy. Astron. Soc. London
351 L49

[10] Godlowski W and Szydlowski M 2005 Phys. Lett. B 623 10

Szydlowski M and Godlowski W 2006 Phys. Lett. B 633 427

[11] Biesiada M 2007 J. Cosmol. Astron. Phys. 0702 003

[12] Szydlowski M, Kurek A and Krawiec A 2006 Phys. Lett. B
642 171

Szydlowski M and Kurek A Preprint astro-ph/0603538

[13] Trotta R Preprint astro-ph/0504022 Mukherjee P,
Parkinson D, Corasaniti P S
Liddle A R and Kunz M 2006 Mon. Not. Roy. Astron. Soc. London
369 1725

Parkinson D, Mukherjee P and Liddle A R 2006 Phys. Rev. D
73 123523

Liddle A R, Mukherjee P and Parkinson D 2006 Preprint
astro-ph/0608184

Serra P, Heavens A F and Melchiorri A Preprint astro-ph/0701338
Trotta R 2007 Preprint astro-ph/0703063

Heavens A F, Kitching T D and Verde L 2007 Preprint
astro-ph/0703191

[14] Riess A G et al 2006 Preprint astro-ph/0611572

[15] Astier P et al 2006 Astron. Astrophys. 447 31

[16] Eisenstein D J et al 2005 Astrophys. J. 633 560

[17] Bond J R, Efstathiou G and Tegmark M 1997 Mon. Not. Roy.
Astron. Soc. London 291 L33

[18] Spergel D N et al 2006 Preprint astro-ph/0603449

[19] Wang Y and Mukherjee P 2006 Preprint astro-ph/0604051