[1] Seiberg N et al 1999 J. High Energy Phys. 032
9909

[2] Connes A et al 1998 J. High Energy Phys. 003
9802

Douglas M R et al 1998 J. High Energy Phys. 008
9802

Douglas M R et al 2001 Rev. Mod. Phys. 73 977

[3] Ardalan F et al 1999 J. High Energy Phys. 016
9902

[4]Curtright T et al 1998 Phys. Rev. D 58 25002

Mezincescu L hep-th/0007046

[5] Chu S C and Ho P M 1999 Nucl. Phys. B 550 151

Chu S C and Ho P M 2000 Nucl. Phys. B 568 447

[6] Schomerus V 1999 J. High Energy Phys. 030 9906

[7] Filk T 1996 Phys. Lett. B 376 53

[8] Castellani L 2000 Class. Quant. Grav. 17 3377

[9] Konechny A and Schwarz A 2002 Phys. Rept. 360
353

[10]Dunne G et al 1990 Phys. Rev. D 41 661

[11] Demetrian M and Kochan D hep-th/0102050

Zhang J Z 2004 Phys. Lett. B 584 204

[12] Li K et al 2005 Mod. Phys. Lett. A 20 2165

[13] Nair V P 2001 Phys. Lett. B 505 249

Nair V P et al 2001 Phys. Lett. B 505 267

[14] Morariu B et al 2001 Nucl. Phys. B 610 531

Morariu B et al 2002 Nucl. Phys. B 634 326

[15]Chaichian M et al 2001 Phys. Rev. Lett. 86
2716

Chaichian M et al 2001 Nucl.Phys. B 611 383

[16]Li K and CHAMOUN N 2006 Chin. Phys. Lett. 23
1122

[17]Chaichian M et al 2002 Phys. Lett. B 527 149

Falomir H et al 2002 Phys. Rev. D 66 045018

Dayi O F and Jellal A 2002 J. Math. Phys. 43
4592

[18]Wang J H and Li K 2007 Chin. Phys. Lett. 24 5

Li K and Chamoun N 2007 Chin. Phys. Lett. 24
1183

[19]Mirza B and Zarei M 2004 Eur. Phys. J. C 32
583

[20]Chambers R G 1960 Phys. Rev. Lett. 5 3

[21] Karabali D et al 2002 Nucl. Phys. B 627 565

[22]See, for examples, Dayi \"{O F and Jellal A 2001
Phys. Lett. A 287 349

Basu B and Ghosh S 2005 Phys. Lett. A 346 133

Susskind L hep-tp/0101029

Lee B H, Moon K and Rim C 2001 Phys. Rev. D 64
085014

[23]Banerjee R 2002 Mod. Phys. Lett. A 17 631

[24]Ghosh S hep-th/0405177

Jellal A hep-th/0105303.

[26]Landau L D 1930 Z. Phys. 64 629