1. Alain Dreveton, 2012, Manufacture of Aluminium Fluoride of High Density and Anhydrous Hydrofluoric Acid from Fluosilicic Acid, Elsevier, Procedia Engineering, Volume 46, 2012, Pages 255-265, SYMPHOS 2011-1st International Symposium on Innovation and Technology in the Phosphate Industry.
2. European commission, Aug. 2007, Integrated Pollution Prevention and Control, reference document on the best available techniques for the manufacture of large volume chemicals – ammonia, acids, fertilisers.