[1] M. Protopapas, C. H. Keitel, P. L. Knight. Atomic physics with super-high intensity lasers. Rep. Prog. Phys., 1997, 60(4):389～486

[2] A. L’Huillier, K. J. Schafer, K. C. Knlander. Theoretical aspects of intense field harmonic generation. J. Phys. B, 1991, 24(15):3315～3341

[3] P. B. Corkum. Plasma perspective on strong-field multiphoton ionization. Phys. Rev. Lett., 1993, 71(12):1994～1997

[4] Ph. Balcou, A. L’Huillier, D. Escande. High-order harmonic generation processes in classical and quantum anharmonic oscillators. Phys. Rev. A, 1996, 53(5):3456～3468

[5] S. Cocke, L. E. Reichi. High-harmonic generation in a driven triangular well: the implications of chaos. Phys. Rev. A, 1996, 53(3):1746～1750

[6] B. Sundaram, P. W. Milonni. High-order harmonic generation: Simplified model and relevance of single-atom theories to experiment. Phys. Rev. A, 1990, 41(11):6571～6573

[7] F. I. Gauthey, B. M. Garraway, P. L. Knight, High harmonic generation and periodic level crossing. Phys. Rev. A, 1997, 56(4):3093～3096

[9] F. I. Gauthey, C. H. Keitel, P. L. Knight et al.. Role of initial coherence in the generation of harmonics and sidebands from strongly driven two-level atom. Phys. Rev. A, 1995, 52(1):525～540

[10] T. Millack, A. Maquet. Hyper-Raman lines produced during high harmonic generation. J. Mod. Opt., 1993, 40(11):2161～2171

[11] Xu Shiliang. Numerical Method Collection for Fortran Language. Beijing: Tsinghua University Press, 1995. 274～278 (in Chinese)

[12] F. I. Gauthey, C. H. Keitel, P. L. Knight et al.. Phase of harmonics from strongly driven two-level atoms. Phys. Rev. A, 1997, 55(1):615～621