1. 1) K. Imatsu, R. Kobayashi, K. Yamada, N. Maida and T. Nakamura: J. Jpn. Soc. Technol. Plast., 45 (2004), 979.
2. 2) K. Imatsu: Trans. Jpn. Soc. Mech. Eng. C, 62 (1996), No. 600, 3320.
3. 3) K. Imatsu: Trans. Jpn. Soc. Mech. Eng. C, 63 (1997), No. 610, 2126.
4. 4) K. Imatsu: Trans. Jpn. Soc. Mech. Eng. C, 63 (1997), No. 610, 2132.
5. 5) K. Imatsu: Trans. Jpn. Soc. Mech. Eng. C, 63 (1997), No. 611, 2538.