[1] Mitra S, Hossain M M, Say B, et al. Optics Communications, 2010, 283: 1500.

[2] Tang W Z, Luo B, Liu Y, et al. Physics Letters A, 2010, 374: 2183.

[3] Liang Q C, Jiang H M, Wang H H, et al. Physica A, 2008, 387: 108.

[4] Li Y Y, Zhang H R, Pang W, et al. Physics Letters A, 2009, 373: 596.

[5] Xu X W, Liu N H. Optics Communications, 2010, 283: 1032.

[6] Yang B D, Liang Q B, He J, et al. Physical Review A, 2010, 81: 043803.

[7] Zhang J P, Xu J, Hernandez G, et al. Physical Review A, 2007, 75: 043810.

[8] Fu G S, Li X L, Zhuang Z H, et al. Physics Letters A, 2008, 372: 176.

[10] Li H J, Huang G X. Physics Letters A, 2008, 372: 4127.

[11] Liu J B, Lü X Y, Liu N, et al. Physics Letters A, 2009, 373, 413.

[12] Wang J. Physical Review A, 2010, 81: 033841.

[13] Wang Z P, Xu M C. Optics Communications, 2009, 282: 1574.

[14] Iftiquar S M. Optics Communications, 2008, 281: 4951.

[15] Zyaei M, Saghai H R, Abbasian K, et al. Optics Communications, 2008, 281: 3739.

[16] Ghosh J, Ghosh R, Goldfarb F, et al. Physical Review A, 2009, 80: 023817.

[17] Yannopapas V, Paspalakis E, Vitanov N V. Physical Review B, 2009, 80: 035104.

[18] Schnorrberger U, Thompson J D, Trotzky S, et al. Physical Review Letters, 2009, 103: 033003.

[19] Ralph T C, Pryde G J. Progress in Optics, 2010, 54: 209.

[20] Mollow B R. Physical Review, 1969, 188: 1969.

[21] Mollow B R. Physical Review A, 1972, 5: 2217.