1. Superconductivity at 93 K in a new mixed-phase Y-Ba-Cu-O compound system at ambient pressure
2. Special Session on High Temperature Superconductivity Materials, American Physical Society Meeting, New York, 18 March 1987. A video tape is available from the American Physical Society.
3. Special Session on High Temperature Superconductor, Spring Meeting of the Japanese Physical Society, Nagoya, 28 March 1987.
4. a For example, W.J. Gallagher, R.L. Sandstrom, T.R. Dinger, T.M. Shaw and D.A. Chance, Solid State Commun., submitted