1. K. Fujino, N. Yoshida, N. Hayashi, S. Okuda, T. Hara and H. Ishii: Advances in Superconductivity VI, p.763. Springer (1994)
2. Y. Iijima, N. Tanabe, O. Kono, and Y. Ikeno: Appl. Phys. Lett. 6 0, 759 (1992)
3. K. Fujino, N. Yoshida, S. Okuda, T. Hara, T. Ohkuma and H. Ishii: Advances in Superconductivity VII, p.629. Springer (1995)
4. K. Hasegawa, N. Yoshida, K. Fujino, H. Mukai, K. Hayashi, K. Sato, T. Ohkuma, S. Honjo, H. Ishii and T. Hara: Proceedings of 16th International Cryogenic Engineering Conference/International Cryogenic Materials Conference, p.1413. Elsevier Science (1997)
5. K. Fujino, K. Hasegawa, H. Mukai, K. Sato, T. Hara, T. Ohkuma, H. Ishii and S. Honjo: Advances in Superconductivity VIII, p.675. Springer (1996)