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 "Frisch, Ragnar and Vigger, Sven",Solving linear equations and inverting matrices when an optimum elimination order is used,,Universitetet i Oslo. Sosialøkonomisk institutt,1958,"Memorandum fra Sosialøkonomisk institutt, Universitetet i Oslo",,,,https://cir.nii.ac.jp/crid/1130000794482879232