SURFACE SCIENCE, vol. 430, no. 1-3, page. L515 - L520, 1999-06-21
PHYSICAL REVIEW LETTERS, vol. 82, no. 20, page. 4066 - 4069, 1999-05-17
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. 276, no. 1-3, page. 353 - 359, 1992-10-01