Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NAGATA Hiroshi and ISHIBASHI Akira and HOYASHITA Shigeru and TAKEDOMI Hidenao,A Variable-Speed Traction Drive with Internal Spherical Disks. Mechanism of Traction Drive and Method for Calculating Power Transmission Efficiency.,"JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry",0914-8825,The Japan Society of Mechanical Engineers,1991,34,4,518-525,https://cir.nii.ac.jp/crid/1390282679655563520,https://doi.org/10.1299/jsmec1988.34.518