1. D. Welford and A. Mooradian, Appl. Phys. Lett. 40, 560 and 865 (1982) .
2. N.B. Abraham, S. Liu and M. Maeda, J. Opt. Soc. Am. 72, 1811 (1982) (Abstract).
3. H. Gamo and H. Osada, CoheJLence and Quantum Opti.c.s, IV Plenum Press, 1978, pp. 583.
4. L.W. Casperson and A. Yariv, Appl. Optics 11, 462 ( 1972 ).
5. S. Asami, H. Gamo and T. Tako, Jpn. J. Appl. Phys. 22, 83–100 (1983).