D. P. O'Brien; Markets and Hierarchies: Analysis and Antitrust Implications, The Economic Journal, Volume 86, Issue 343, 1 September 1976, Pages 619–621, https:
D. P. O'Brien; Markets and Hierarchies: Analysis and Antitrust Implications, The Economic Journal, Volume 86, Issue 343, 1 September 1976, Pages 619–621, https: