[1] Bloom D. Η., (1978) Sub-picosecond optical grating and wavefront conjugation by four-wave mixing in "Picoscond Phenomena" (C. V. Shank E. P. Ippen and S. L. Shapiro, eds.). P. 96, Springer-Verlag, Berlin and New York.
[2] Yariv Α., Pepper D. M.; Opt. Lett., 1977, 1, 16.
