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
"Lehtonen, Tapani",Stochastic comparisons of nonhomogeneous queueing systems with exponential servers,,Helsinki School of Economics,1981,Helsingin Kauppakorkeakoulun julkaisuja,,9516993672,,https://cir.nii.ac.jp/crid/1130000797954358400