1. Chemical Marketing Reporter, 1 October 1995
2. Chemical Economics Handbook – SRI International, Report 543.7500, May 1994
3. Methyl t-Butyl Ether (MTBE) Production: A Comparison of Montmorillonite-Derived Catalysts with an Ion-Exchange Resin
4. J.F. Knifton, US Patent 4 827 048 (1989) to Texaco Chemical Company
5. J.F. Knifton, US Patent 5 157 161 (1992) to Texaco Chemical Company