Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) MURAKAMI Yasunori and KAWABE Toshio,Photoelastic Study of Flat Bars with a Double Notch on One Edge Subjected to Pure Bending,Transactions of the Japan Society of Mechanical Engineers,00290270,The Japan Society of Mechanical Engineers,1960,26,170,1387-1395,https://cir.nii.ac.jp/crid/1390282680131929600,https://doi.org/10.1299/kikai1938.26.1387