1. Japan Electronics Almanac 1986 Dempa Publications, Inc., Tokyo 412
2. Possible High Tc Superconductivity in the Ba-La-Cu-O System;Bednorz;Z. Phys. B-Condensed Matter,1986
3. Superconductivity at 93K in a New Mixed-Phase Y-Ba-Cu-O Compound System at Ambient Pressure;Wu;Phys. Rev. Lett.,1987
4. Bulk Superconductivity at 91K in Single Phase Oxygen-Deficient Perovskite Ba2YCu3O9-δ;Cava;Ibid.
5. F. Beech S. Miraglia A. Santoro R. S. Roth Neutron Study of the Crystal Structure and Vacancy Distribution of the Superconductor Ba 2 YCu 3 -O 9-δ Unpublished work