1. Council of Supply Chain Management Profession: 2012 State of Logistics Report
2. Maltz, A., DeHoratius, N.: Warehousing: The Evolution Continues. Warehousing Education and Research Council (2005)
3. Unilever Sustainable Living,
http://www.unilever.com/sustainable-living/greenhousegases/transport/
4. Ryder System, Inc.: Stonyfield Case Study (2012)
5. Hanes Carbon Footprint,
http://www.hanesbrandscsr.com/carbon-footprint.html