JOURNAL OF APPLIED PHYSICS, vol. 98, no. 2, 2005-07-15
CHEMICAL PHYSICS LETTERS, vol. 384, no. 1-3, page. 16 - 19, 2004-01-19
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, vol. 82, no. 10, page. 2762 - 2768, 1999-10