1. See Figure 1 from www.batteryuniversity.com/parttwo-34.htm
2. See http://techon.nikkeibp.co.jp/english/NEWS_EN/20070110/126295
3. See www.h2fc.com/industry.html, under DMFC companies.
4. World advances in microfuel cell technology (Technical Insights). Frost & Sullivan, March 2005, www.frost.com
5. See www.polyfuel.com/pressroom/press_pr_110706.html; and www.frost.com