Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Zhang Kun and Nakahira KatsukoT. and Yoshiki Mikami Yoshiki Mikami,MAKING OF A RISK-MATRIX BASED ON PRODUCT ACCIDENT DATA,SOCIOTECHNICA,13490184,Sociotechnology Research Network,2010,7,,66-75,https://cir.nii.ac.jp/crid/1390282680266338560,https://doi.org/10.3392/sociotechnica.7.66