[2] M. Hentschel, R. Kienberger, C. Spielmann. Attosecond metrology. Nature, 414, 509-513(2001).
[10] B. A. Malomed. Soliton Management in Periodic Systems(2006).
[30] L. E. Nelson, D. J. Jones, K. Tamura. Ultrashort-pulse fiber ring lasers. Appl. Phys. B, 65, 277-294(1997).