1. S. Broek: Update on SO2 Scrubbing Applied in Primary Aluminium Smelters, Light Metals 2020, 766–776.
2. M. Krämer, M. Schubert, T. Lautensack, T. Hill, R. Körner, F. Rosowski, and J. Zihlke: Catalyst for the Oxidation of SO2 to SO3, US Patent No. 8,323,610 B2 (2012).
3. O.-A. Lorentsen, A. Dyrøy, and M. Karlsen: Handling CO2eq from an Aluminum Electrolysis Cell, Light Metals 2009, 263–268.
4. G. Wedde: A Method of Ventilating an Aluminium Production Electrolytic Cell, European Patent No. 2,360,296 A1 (2011), US Patent No. 9,458,545 B2 (2016), US Patent No. 9,771,660 B2 (2017).
5. G. Wedde, O.E. Bjarnø, and A.K. Sørhuus: Recycled Pot Gas Distribution, US Patent US 9 234 286 B2 (2016).