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. Superconductivity in the Bi - Sr - Cu - O system
4. H. Maeda, Y. Tanaka, M. Fukutomi and T. Asano, to be published.
5. R. M. Hazen, C. T. Prewitt, R. J. Angel, N. L. Ross, L. W. Finger, C. G. Hadidiacos, D. R. Veblen, P. J. Heaney, P. H. Hor, R. L. Meng Y. Y. Sun, Y. Q. Wang, Y. Y. Xue, Z. J. Huang, L. Gao, J. Bechtold and C. W. Chu, to be published.