Protopapas, M; Keitel, C H; Knight, P L (1 April 1997). „Atomic physics with super-high intensity lasers“. Reports on Progress in Physics. 60-jild, № 4. 389–486-bet. Bibcode:1997RPPh...60..389P. doi:10.1088/0034-4885/60/4/001.
Protopapas, M; Keitel, C H; Knight, P L (1 April 1997). „Atomic physics with super-high intensity lasers“. Reports on Progress in Physics. 60-jild, № 4. 389–486-bet. Bibcode:1997RPPh...60..389P. doi:10.1088/0034-4885/60/4/001.