Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) YUKAWA Harutoshi and UMEDA Nobuaki and KAWAMURA Shozo,B23 Investigation of bumper performance of sports surface by analysis of runner-sports surface coupled system,"The Proceedings of Joint Symposium: Symposium on Sports Engineering, Symposium on Human Dynamics",2433-1309,The Japan Society of Mechanical Engineers,2008,2008,0,303-306,https://cir.nii.ac.jp/crid/1390282681045452800,https://doi.org/10.1299/jsmesports.2008.0_303