1. Motupally S, Mah DT, Freire FJ, Weidner JW (1998) Electrochem Soc Interface 7(3):32
2. Deacon H (1875) US patent 165,802
3. Shell Oil Company (1965) US patent 3210158
4. Kiyoura T, Yoshida K, Nishida H (1991) Shokubai 33:15
5. Mortensen M, Minet RG, Tsotsis TT, Benson SW (1999) Chem Eng Sci 54:2131