Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 吉田 始 and 坂井田 喜久 and 中村 保 and 早川 邦夫 and 磯谷 章 and 矢代 茂樹,Cold Extrusion of Spur Gear with Inner Spline with Reductionin Outer Diameter or Expansion of Inner Diameter of Workpiece,Journal of the Japan Society for Technology of Plasticity,00381586,The Japan Society for Technology of Plasticity,2013,54,626,262-266,https://cir.nii.ac.jp/crid/1390282681475695104,https://doi.org/10.9773/sosei.54.262