Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Vitzthum, Wolfgang, Graf and Bothe, Michael",Völkerrecht,"4., neu bearbeitete Aufl",De Gruyter Recht,2007,De Gruyter Lehrbuch,,"9783899494259,9783899494266",,https://cir.nii.ac.jp/crid/1130282270997365376