A. M. Zheltikov

Optical attosecond pulses and tracking the nonlinear response of bound electrons

E. Goulielmakis, F. Krausz, A. Zheltikov, 2016, Nature.

Soliton self-frequency shift of 6-fs pulses in photonic-crystal fibers

F. Krausz, T. Metzger, N. Ishii, 2005 .