Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) YOKOYAMA Tetsu and SHIMIZU Koshirou and KIMURA Kazuhiro,RESEARCH INTO THE EFFECT ON BEHAVIOR OF WHEELCHAIR BY SIDEWALK GRADIENTS,Doboku Gakkai Ronbunshu,02897806,Japan Society of Civil Engineers,1999-01-20,1999,611,21-32,https://cir.nii.ac.jp/crid/1390282680285416192,https://doi.org/10.2208/jscej.1999.21