Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NAEMURA Kiyoshi and SAITO Hideya,Precise positioning of the epidural anesthesia needles by puncture force,Micromechatronics,13438565,The Horological Institute of Japan,2005,49,193,38-44,https://cir.nii.ac.jp/crid/1390282681549391488,https://doi.org/10.20805/micromechatronics.49.193_38