INFORMATION SHEET 互联网档案馆的存檔,存档日期2010-11-22. Tixador, P. Superconducting Magnetic Energy Storage: Status and Perspective. [1] (页面存档备份,存于互联网档案馆) Ultracapacitor
David. Energy Density of Protein. The Physics Factbook. 2003 [5 November 2011]. (原始内容存档于2011-11-26). Panda, Anurag. Energy Density of Carbohydrates. The