Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) M. Nishijima and T. Murotani,On the interaction of oxygen with Si(111) surfaces,Surface Science,0039-6028,Elsevier BV,1973-09,39,2,441-444,https://cir.nii.ac.jp/crid/1360298344733414656,https://doi.org/10.1016/0039-6028(73)90015-0