PHYSICAL REVIEW B, vol. 78, no. 3, 2008-07
SURFACE SCIENCE, vol. 559, no. 2-3, page. 141 - 148, 2004-06-20
SURFACE REVIEW AND LETTERS, vol. 3, no. 3, page. 1487 - 1494, 1996-06
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, vol. 60, no. 1, page. 35 - 40, 1995-01
SURFACE SCIENCE, vol. 301, no. 1-3, page. 295 - 305, 1994-01-10
JOURNAL OF APPLIED PHYSICS, vol. 69, no. 5, page. 3354 - 3356, 1991-03-01