1. W. A. Barrow, R. E. Coovert and C. N. King: SID 84 Digest, p249.
2. S. Tanaka, H. Deguchi, Y. Mikami, H. Shiiki and H. Kobayashi: Proceedings of the Society for Information Display, 28, p21 (1987).
3. S. Tanaka, H. Yoshiyama, J. Nishiura, S. Ohshio, H. Kawakami and H. Kobayashi: SID 88 Digest p293.
4. J.H. Brightwell, B. Ray and S. White: Journal of Materials Science Letters 3, p951 (1984).
5. W. Lehmann: Journal of Luminance 5, p87 (1972).