Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Torizuka Shiro,Present Trend of the Development of Ultrafine-Grained Steels and Its Technology Transfer,Materia Japan,13402625,The Japan Institute of Metals and Materials,2006,45,6,438-443,https://cir.nii.ac.jp/crid/1390001204056048896,https://doi.org/10.2320/materia.45.438