Cheng C.-H.Chang L.-W.KWAN-HWA LIN2020-06-292020-06-2920101016-2372https://www.scopus.com/inward/record.uri?eid=2-s2.0-77953852011&doi=10.4015%2fS1016237210001931&partnerID=40&md5=60d3703896f688c24f88690d79cc8b19https://scholars.lib.ntu.edu.tw/handle/123456789/506221Determination of foot-plate spacing for swivel walkers by an optimization methodjournal article10.4015/S10162372100019312-s2.0-77953852011