1. 3) T. Nishitani, A. Kawaguchi, K. Takami, Y. Kikuchi and I. Sakurada ; Abst. 115th Meet., p.249 (Surf. Finish. Soc. Jpn., 2007) (in Japanese).
2. 4) T. Nishitani, A. Kawaguchi, K. Takami and I. Sakurada ; Abst. 116th Meet., p.177 (Surf. Finish. Soc. Jpn., 2007) (in Japanese).
3. 5) T. Nishitani, A. Kawaguchi and H. Honma ; Abst. 118th Meet., p.184 (Surf. Finish. Soc. Jpn., 2008) (in Japanese).
4. 6) T. Nishitani, A. Kawaguchi and H. Honma ; Abst. 118th Meet., p.191 (Surf. Finish. Soc. Jpn., 2008) (in Japanese).
5. 7) Y. Einaga ; NEW DIAMOND, 24, (2), 3 (2008) (in Japanese).