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
"Freeman, R. S.",Closed operators and their adjoints associated with elliptic differential operators,rev.,"Department of Mathematics, University of Maryland",1965,Technical report,,,,https://cir.nii.ac.jp/crid/1130000793993381120