Superconductivity Affected by Zr Doping in Bi2Sr2CaCu2Oy Ceramic Jian, Sha ; Wei, Liu ; Zhu, C. F. ; Wang, S. X. ; Wang, N. L. ; Cheng, X. A. ; Cao, L. Z. ; Cheng, Z. J. ; Cheng, Z. Y. ; Zhang, Q. R. Abstract Publication: Physica Status Solidi Applied Research Pub Date: May 1990 DOI: 10.1002/pssa.2211190152 Bibcode: 1990PSSAR.119...59J