1. Development of international freight transit in Latvia;Bulis;Procedia – Social and Behavioral Sciences,2013
2. Freight transport logistics in the Baltic Sea region;Kabashkin;Regional aspects. Transport and Telecommunication,2012
3. Multiple-criteria analysis and choice of transportation alternatives in multimodal freight transport system;Kopytov;Transport and Telecommunication,2012
4. Kotker, N., & Fitzgerald, C.P. (1969). The Horizon History of China. New York: American Heritage Publishing Co., (Chapter 9).
5. Laaksonen, E., & Makinen, H. (2012). Maritime cluster analysis on the Central Baltic region. Turku: University of Turku, p. 51.