Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) OKURA Shinsuke and HASEGAWA Keiji and GOTOH Takashi,New Technology of Manufacturing for Coil Springs used in Automotive Suspensions,Transactions of Japan Society of Spring Engineers,03856917,Japan Society of Spring Engineers,2005,2005,50,31-38,https://cir.nii.ac.jp/crid/1390001205214944512,https://doi.org/10.5346/trbane.2005.31