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
"Arjas, Elja and Lehtonen, Tapani",Approximating many server queues by means of single server queues,,Helsinki School of Economics,1977,Helsingin Kauppakorkeakoulun julkaisuja,,9516991408,,https://cir.nii.ac.jp/crid/1130000798245755392