JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 85, no. 8, page. 2122 - 2124, 2002-08
JOURNAL OF MATERIALS RESEARCH, vol. 17, no. 8, page. 1884 - 1887, 2002-08
APPLIED PHYSICS LETTERS, vol. 79, no. 7, page. 1051 - 1053, 2001-08-13