@book{ BA6086670X,
 author = "Levitan, Richard and Shubik, Martin",
 title = "Price duopoly and capacity constraints",
 publisher = "Cowles Foundation for Research in Economics at Yale University",
 year = "1970",
 series = "Cowles Foundation discussion paper / Cowles Foundation for Research in Economics at Yale University",
 number = "no. 287",
 URL = "https://ci.nii.ac.jp/ncid/BA6086670X"
}
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