Scientific Reports, vol. 8, no. 1, 2018-10
SURFACE SCIENCE, vol. 602, no. 10, page. 1916 - 1920, 2008-05-15
PHYSICAL REVIEW B, vol. 73, no. 3, page. 35310 - 35310, 2006-01
PHYSICAL REVIEW B, vol. 72, no. 19, page. 193309 - 193310, 2005-11