JOURNAL OF MATERIALS RESEARCH, vol. 17, no. 10, page. 2705 - 2711, 2002-10
JOURNAL OF PHYSICS D-APPLIED PHYSICS, vol. 35, no. 13, page. R105 - R120, 2002-07-07
SURFACE REVIEW AND LETTERS, vol. 9, no. 1, page. 567 - 570, 2002-02