Program. Retrieved January 31, 2009(ref. to 生物质) An Improved Filter for WasteOil (页面存档备份,存于互联网档案馆) - Scientific American Magazine September 29, 1888 Issue
(页面存档备份,存于互联网档案馆) 這些國家垃圾管理很得力[永久失效連結] - 2011年07月11日 - 深圳特區報 An Improved Filter for WasteOil (页面存档备份,存于互联网档案馆) - Scientific American Magazine September 29, 1888 Issue