1. J. Völkl and G. Müller,E-MRS Mtg. 16, 141 (1987).
2. G. Müller,E-MRS Mtg. 16,117 (1987).
3. R. Hirano, T. Kanazawa, Y. Itoh, T. Itokawa, H. Onodera and M. Nakamura,Proc. 5th Intl. Conf. on InP and Related Materials, Paris, 648 (New York: IEEE, 1993), #93CH3276-3.
4. M. Yamada,Rev. Sci. Instrum. 64, 1815 (1993).
5. M. Yamada, M. Fukuzawa, Y. Yabuhara and M. Yokogawa,Proc. 5th Intl. Conf. on InP and Related Materials, Paris, 69 (New York: IEEE, 1993), #93CH3276-3.