Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Shumin Zhai and Paul Milgram,Human performance evaluation of isometric and elastic rate controllers in a six-degree-of-freedom tracking task,SPIE Proceedings,0277-786X,SPIE,1993-12-21,2057,,130-141,https://cir.nii.ac.jp/crid/1360863729185603968,https://doi.org/10.1117/12.164895