Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Halada Kohmei,Sustainability Risk of Metals and Elements,Materia Japan,13402625,The Japan Institute of Metals and Materials,2007,46,8,543-548,https://cir.nii.ac.jp/crid/1390001204055288192,https://doi.org/10.2320/materia.46.543