1. Encyclopaedia Britannica.
http://global.britannica.com/EBchecked/topic/615316/unit-train
2. Rail Freight Portal.
http://www.railfreightportal.com/Block-Train-Full-Train
3. Sanchez Rodrigues, V., Pettit, S., Harris, I., Beresford, A., Piecyk, M., Yang, Z., Ng, A.: UK Supply Chain Carbon Mitigation Strategies using Alternative Ports and Multimodal Freight Transport Operations. Transportation Research Part E-Logistics and Transportation Review, In Press (2015)
4. Kim, K.: Block Train Reorganizing the Global Logistics Market. Monthly Maritime Korea, 416 (2008)
5. Korea Intellectual Property Rights Information Service.
http://engdtj.kipris.or.kr/engdtj/searchLogina.do?method=loginTM&checkPot=Y