著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Werra, D. de and Hertz, A",Graph colouring and variations,,North-Holland,1989,Annals of discrete mathematics,,0444705333,,https://cir.nii.ac.jp/crid/1130282272703135616