6Foster Tom. 4PLs: The next generation for supply chain outsourcing? [J]. Logistics Management & Distribution Report, 1999, 38 (4) : 35.
7Marino Gene. The ABCs of 4PLs[J]. Industrial Management, 2002, 44(1): 23.
8Susanne Hertz, Monica Alfredsson. Strategic development of third party logistics providers[ J]. Industrial Marketing Management, 2003, 32(1): 139-149.
