1. Title: Spatial competition in networks under delivered pricing

Authour:Dorta-González P, Santos-Peñate DR, Suárez-Vega R   

 Source：Papers in Regional Science 84: 271–280，2005。

2. Title: Cournot and Bertrand in shipping models with circular markets.

Author:Matsumura T, Shimizu D

Source: Papers in Regional Science 85: 585–598,2006.

不胜感激！