Aigueperse, J. et al. (2005) "Fluorine Compounds, Inorganic" in Ullmann’s Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, doi:10.1002/14356007.a11_307
Herbert H. Hyman; Martin Kilpatrick; Joseph J. Katz (July 1957). "The Hammett Acidity Function H0 for Hydrofluoric Acid Solutions". J. Am. Chem. Soc. 79 (14): 3668–3671. doi:10.1021/ja01571a016. Contribution from the Chemistry Division, Argonne National Laboratory, and the Department of Chemistry, Illinois Institute of Technology.
