1. OECD Glossary of Statistical Terms: Concentration;OECD (Organization for Economic Co-operation and Development),2003
2. Horizontal Merger Guidelines;U.S. Department of Justice and the Federal Trade Commission,2010
3. Concentration in the Steel Industry;Herfindahl,1950
4. National Power and the Structure of Foreign Trade;Hirschman,1945
5. Mergers, Acquisitions, and Corporate Restructuring;Gaughan,2011