4Bruce W Marion and Donghwan Kim. Concentration Change in Selected Food Manufacturing Industries: The Influence of Mergers vs. Internal Growth [J]. Agribusiness.1991 (4) : 15-431.
5Barbara M.Roberts. Transition and changes in industrial concentration in PolandJJ]. The Congress of the European Economic Association, Berlin, 1998(9):3-5,.
6Bienvenido S.Cortes. Trends in industrial concentration in Japan, 1983-1992 [J]. International Review of Applied Economics.1998 (12) : 271-282.