1. L.B. Kreuzer, in Optoacoustic Spectroscopy and Detection, ed. By Y. H. Pao (Academy, New York 1977)
2. W. Schnell and G. Fischer, Opt. Lett. 1, 38?39 (1977)
3. M. W. Sigrist, J. Appl. Phys. 60, R83(1986).
4. ?Photoacoustic and Photothermal Phenomena?, Eds. P. Hess and J. Pelzl, Proc. of 5th Int. Topical Meeting, Springer Verlag, Heidelberg (1987)
5. S. Yamamoto, J. Mol. Spectrosc. Vol. 106, 376 (1984)