著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) YOSHIKAWA T.,Dynamic Hybrid Position/Force Control of Robot Manipulators : Estimation of Unknown Constraint,Proc. IEEE Conf. on Robotics and Automation,,,1990,,,1231-1236,https://cir.nii.ac.jp/crid/1570291224658415744,