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 "Ruymgaart, Frits H.",A note on the concept of joint distributions of pairs of observables,,"Mathematische Instituut, Katholieke Universiteit",1981,Report,,,,https://cir.nii.ac.jp/crid/1130000794625997824