1. Possible highT c superconductivity in the Ba?La?Cu?O system
2. Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure
3. R.J. Cava, B. Batlogg, R.B. Van Dover, D.W. Murphy, S. Sunshine, T. Siegrist, J.P. Remeika, E.A. Rietman, S. Zahurak, G.P. Espinosa, Phys. Rev.
4. S. Hosoya, S. Shamoto, M. Onoda and M. Sato, Jpn. J. Appl. Phys. (To be published).
5. S. Kagoshima, K. Koga, H. Ysuoka, Y. Nogami, K. Kubo and S. Hikami, Jpn. J. Appl. Phys. (To be published).