JOURNAL OF APPLIED PHYSICS, vol. 94, no. 11, page. 7201 - 7205, 2003-12-01
APPLIED PHYSICS LETTERS, vol. 82, no. 4, page. 583 - 585, 2003-01-27
APPLIED PHYSICS LETTERS, vol. 82, no. 4, page. 580 - 582, 2003-01-27
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, vol. 21, no. 1, page. 87 - 90, 2003-01