1. [1] B.P. Martins, Recent Developments in Superconductivity Research (Nova Publishers, New York, 2006) p.68.
2. [2] J.H. Claassen, M.E. Reeves and R.J. Soulen, Jr., Rev. Sci. Instrum. 62, 996 (1991).
3. [3] Y. Mawatari, H. Yamasaki and Y. Nakagawa, Appl. Phys. Lett. 81, 2424 (2002).
4. [4] S.B. Kim, Physica C 463-465, 702 (2007).
5. [5] S. Ohshima, K. Takeishi, A. Saito, M. Mukaida, Y. Takano, T. Nakamura, I. Suzuki and M. Yokoo, IEEE Trans. Appl. Supercond. 15, 2911 (2005).