CERAMICS INTERNATIONAL, vol. 26, no. 4, page. 421 - 425, 2000-01
JOURNAL OF MATERIALS RESEARCH, vol. 12, no. 5, page. 1327 - 1334, 1997-05
THIN SOLID FILMS, vol. 330, no. 2, page. 89 - 95, 1998-09-30