Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 村上 裕則 and 川辺 敏雄,Photoelastic Study of Flat Bars with Multiple Notches Subjected to Pure Bending,Journal of the Society of Mechanical Engineers,00290270,The Japan Society of Mechanical Engineers,1962,65,525,1502,https://cir.nii.ac.jp/crid/1390001205916960640,https://doi.org/10.1299/jsmemag.65.525_1502_3