Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Utsumi Makoto and Kato Takashi and Yamakawa Shinji,Mechanisms of Inner Skeleton Frame Type Biped Walking Robot.,Journal of the Robotics Society of Japan,02891824,The Robotics Society of Japan,1998,16,4,491-498,https://cir.nii.ac.jp/crid/1390282679703860864,https://doi.org/10.7210/jrsj.16.491