Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
YAMAMOTO Itsuro,Spheres Rolling down Slopes(Papers from the Tohoku Section),Journal of the Physics Education Society of Japan,03856992,The Physics Education Society of Japan,2011,59,3,226-230,https://cir.nii.ac.jp/crid/1390001204517151872,https://doi.org/10.20653/pesj.59.3_226