PREPARATION, MICROSTRUCTURE AND ELECTRICAL PROPERTIES OF ERBIA AND YTTRIA-DOPED TETRAGONAL ZIRCONIA J.R. JURADO, C. MOURE et P. DURÁN J. Phys. Colloques, 47 C1 (1986) C1-789-C1-793 DOI: 10.1051/jphyscol:19861120