1. J. Topp-Jorgensen, US Patent 4,536,485 to Haldor Topsoe A/S, Denmark, 1985.
2. J.B. Hansen, F.H. Joensen, H.F.A. Topsoe, US Patent 5,189,203 to Haldor Topsoe A/S, Denmark, 1993.
3. EMPLOYMENT
4. Haldor Topsoe, Volvo, Statoil, DTI, Demonstration of DME Fuelled City Bus, SAE 2000–1–2005.
5. An integrated air–POM syngas/dimethyl ether process from natural gas