Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Hitchin, Nigel and Segal, Graeme and Ward, Richard Samuel","Integrable systems : twistors, loop groups, and Riemann surfaces",,Clarendon Press,1999,Oxford graduate texts in mathematics,,0198504217,,https://cir.nii.ac.jp/crid/1130282270573348480