1.【作者(必填)】Matyas
【文题(必填)】Proper Econometric Specification of the Gravity Model
【年份(必填)】1997
【全文链接或数据库名称(选填)】
http://onlinelibrary.wiley.com/doi/10.1111/1467-9701.00074/abstract
2. 作者:Matyas
文题:The Gravity Model: Some Econometric Considerations
年份:1998
链接:
http://onlinelibrary.wiley.com/doi/10.1111/1467-9701.00136/abstract