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 "Owings, James C., Jr.",An elementary approach to Diophantine equations of the second degree,,"Department of Mathematics, University of Maryland",1969,Technical report,,,,https://cir.nii.ac.jp/crid/1130000797205594496