1. Appliance Standards Awareness project. July 2011http://www.appliance-standards.org/sites/default/files/Refrigerator%20Graph_July_2011.PDF
2. ULT Freezer Performance Testing, Design Services Network, Project #111686, November 2011http://escoglobal.com/products/download/1330394543.pdf
3. Inventory of Carbon and Energy, Version 1.6a;Hammond,2008