Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Watanabe Tsuguhiro,Comment on double exponential formula.,Kakuyūgō kenkyū,04512375,The Japan Society of Plasma Science and Nuclear Fusion Research,1990,63,5,397-411,https://cir.nii.ac.jp/crid/1390282681489156480,https://doi.org/10.1585/jspf1958.63.397