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
"Appel, Kenneth I. and Haken, W. (Wolfgang)",Every planar map is four colorable,,American Mathematical Society,1989,Contemporary mathematics,,0821851039,,https://cir.nii.ac.jp/crid/1130000793764737792