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
"Petrov, I︠U︡. P. (I︠U︡riĭ Petrovich)",Variational methods in optimum control theory,,Academic Press,1968,Mathematics in science and engineering : a series of monographs and textbooks,,,,https://cir.nii.ac.jp/crid/1130282272130251904