1. K. Takeuchi, T. Yamamoto, A. Furukawa, T. Tamura, and K. Yoshida, Tech. Digest Technical Papers 4, 9 (1995).
2. A. Hori, H. Nakaoka, H. Umimoto, K. Yamashita, M. Takase, N. Shimizu, B. Mizuno, and S. Odanaka, Tech. Digest Int. Elec. Dev. Meeting (1994), pp. 485–488.
3. K. Shibahara and D. Onimatsu, Mater. Res. Soc. Symp. 610, B8.5.1 (2000).
4. K. Shibahara, IEICE Trans. Elec. E85-C, No. 5 (2002), pp. 1091–1097.
5. G.A. Sai-Halasz, K.T. Short, and J.S. Williams, IEEE Elec. Dev. Lett. 6, 285 (1985).