APPLIED PHYSICS LETTERS, vol. 89, no. 22, page. 223511 - 223511, 2006-11-27
ADVANCED MATERIALS, vol. 13, no. 16, page. 1274 - 1278, 2001-08-16
APPLIED PHYSICS LETTERS, vol. 76, no. 16, page. 2152 - 2154, 2000-04-17