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 "Bixby, Robert E.",A strengthened form of Tutte's characterization of regular matroids,,"Mathematics Research Center, University of Wisconsin",1975,MRC Technical Summary Report,,,,https://cir.nii.ac.jp/crid/1130282269154086272