[1] Strickland D, Mourou G. Compression of amplified chirped optical pulses. Opt. Commun., 1985, 56(3):219~221
[4] Sarachik E S, Schappert G T. Classical theory of the scattering of intense laser radiation by free electrons. Phys. Rev. (D), 1970, 1(10):2738~2753