Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Sato Shuntaro,It's not correct the golden-ratio is (-1十√5)/2,Japan Journal of Mathematics Education and Related Fields,13497332,Mathematics Education Society of Japan,2008,49,3-4,61-64,https://cir.nii.ac.jp/crid/1390848250105664128,https://doi.org/10.34323/mesj.49.3-4_61