[1] Ziff R M, Gulari E and Barshad Y 1986 Phys. Rev.
Lett. 56 2553

[2] Meakin P 1990 J. Chem. Phys. 93 2903

[3] Albano E V 1991 J. Chem. Phys. 94 1499

[4] Hua D Y and Ma Y Q 2002 Chin. Phys. Lett. 19
534

[5] Albano E V 1992 J. Phys. A 25 2557

[6] Khan K M, Albano E V and Monetti R A 2001 Surf.
Sci. 481 78

[7] Qaisrani A U, Khan K M and Khalid M 2004 Int. J. Mod.
Phys. C 15 1215

[8] Khan K M and Yaldram K 2000 Surf. Sci. 445
186

[9] Khan K M 2000 Surf. Sci. 470 155

[10] Khalid M, Khan K M, Qaisrani A U and Malik Q N 2004
Chin. Phys. Lett. 21 1171

[11] Qaisrani A U, Khalid M and Baloch M K 2004 Chin.
Phys. Lett. 21 1838

[12] Meakin P 1990 J. Chem. Phys. 93 2903

[13] Imbihl R and Ertl G 1995 Chem. Rev. 95 697

[14] Yaldram K and Khan M A 1991 J. Catal. 131
369

[15] Yaldram K and Khan M A 1992 J. Catal. 136
279

[16] Brosilow B J and Ziff R M 1992 J. Catal.
136 275

[17] Wolf N O, Burgess D R and Hoffman D K 1980 Surf.
Sci. 100 453

[18] Sing-Boparai S P, Bowker M and King D A 1975 Surf.
Sci. 53 55

[19] Comsa G, David R and Schumacher B J 1980 Surf.
Sci. 95 L210

[20] Harris J, Kasemo B and Tornqvist E 1981 Surf.
Sci. 105 L288

[21] Jackson B and Person M 1995 J. Chem. Phys.
103 6257

[22] Khalid M, Qaisrani A U and Ahmed W 2005 Chin. Phys.
Lett. 22 1533