Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sakai Yuji,Current state of AES Chemical state analysis,Journal of Surface Analysis,1341-1756,The Surface Analysis Society of Japan,2006,13,3,239-244,https://cir.nii.ac.jp/crid/1390294807616017792,https://doi.org/10.1384/jsa.13.239