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
"Khmelevskiĭ, I︠U︡. I. (I︠U︡riĭ Ilʹich)",Equations in free semigroups,,American Mathematical Society,1976,Proceedings of the Steklov Institute of Mathematics,,0821830074,,https://cir.nii.ac.jp/crid/1130282269921847424