1. Anderson, J.E. 1979. A theoretical foundation for the gravity equation. American Economic Review 69 (1): 106–116.
2. Anderson, J.E., and E. van Wincoop. 2003. Gravity with gravitas: A solution to the border puzzle. American Economic Review 93: 170–192.
3. Arvis, J.F., D. Saslavsky, L. Ojala, B. Shepherd, C. Busch, and A. Raj. 2016. Trade logistics in the global economy: The logistics performance index and its indicators. Washington: The World Bank.
4. Banomyong, R. 2005. The impact of port and trade security initiatives on maritime supply-chain management. Maritime Policy & Management 32 (1): 3–13.
5. Behar, A., and P. Manners. 2008. Logistics and exports. Department of Economics and CSAE Working Paper Series (13).