1. Y.-J. Huang, C.F. Shun, L.G. Daniel, E.L. Mohundro, J.E. Hartgerick: US Patent 5,332,705 (to Exxon Chemical Patents Inc.), 1994.
2. J. Cosyns, J.-P. Boitiaux: US Patent 4,571,442 (Institut Francais du Petrole), 1984.
3. J.B. Hall, B.J. Huggins, M.P. Kaminsky, B.L. Meyers: AIChE Spring National Meeting, 1994.
4. P. Praserthdam, U.S. Patent: 5,849,662, 1998.
5. P. Praserthdam, S. Phatanasri, J. Meksikarin: Catal. Today, 63, 209 (2000).