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 "Bloch, Claude",Variation principle and conservation equations in non-local field theory,,I kommission hos Munksgaard,1950,Det Kgl. danske videnskabernes selskab,,,,https://cir.nii.ac.jp/crid/1130282273274887552