Comments on "Determination of the Nonlinear Optical Susceptibility χ⁽²⁾of Surface Layers" by B. Dick et al.

T.F. Heinz, H.W.K. Tom, et al.

IQEC 1984

T.F. Heinz, T. Suzuki

Proceedings of SPIE 1989

P.Y. Yu, N. Amer, et al.

Physical Review B

A. Karn, S.M. Arakelian, et al.

Physical Review Letters