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
"Petrushev, P. P. (Penco Petrov) and Popov, Vasil A. (Vasil Atanasov)",Rational approximation of real functions,,Cambridge University Press,1987,Encyclopedia of mathematics and its applications,,0521331072,,https://cir.nii.ac.jp/crid/1130282271274569088