1. Watanabe, T., Shiohara, Y., Izumi, T.: IEEE Trans. Appl. Supercond. 13, 2445 (2003)
2. Iijima, Y., Kakimoto, K., Saitoh, T.: IEEE Trans. Appl. Supercond. 13, 2466 (2003)
3. Kajikawa, K., Mawatar, Y., Hayashi, T., Funaki, K.: Inst. Phys. Conf. Ser. 181, 2021 (2004)
4. Babaei-Brojeny, A.A., Clem, J.R.: Phys. Rev. B 64, 184507 (2001)
5. Babaei-Brojeny, A.A., Clem, J.R.: Phys. Rev. B 68, 174514 (2003)