Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Vitzthum, Wolfgang, Graf and Bothe, Michael",Völkerrecht,"3., neu bearbeitete Aufl",De Gruyter Recht,2004,De Gruyter Lehrbuch,,"3899490754,3899490770",,https://cir.nii.ac.jp/crid/1130282271262185216