Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Okamoto T. and Takagi K. and Kumamoto M.,Electromyographicai Study of the Extension of the Upper Extremity,Japanese Journal of Physical Fitness and Sports Medicine,0039906X,The Japanese Society of Physical Fitness and Sports Medicine,1966,15,1,37-42,https://cir.nii.ac.jp/crid/1390282679897108224,https://doi.org/10.7600/jspfsm1949.15.37