篇名：Competition Among Middlemen When Buyers and Sellers Can Trade Directly

作者：John Fingleton

期刊：The Journal of Industrial Economics
卷号及页码：Volume 45, Issue 4, pages 405–427, December 1997
电子连接：http://onlinelibrary.wiley.com/doi/10.1111/1467-6451.00056/full