1. A.G. Sharpe, in: J.H. Simons, Fluorine Chemistry, Vol. 2, Academic Press, New York, 1954, p. 1.
2. N. Booth, D. Martin, Boron Trifluoride and its Derivatives, Wiley, New York, 1949.
3. D.W.A. Sharp, Fluoroboric Acid and its Derivatives, in: M. Stacey, J.C. Tatlow, A.G. Sharpe (Eds.), Advances in Fluorine Chemistry, Vol. 1, Butterworths, London, 1960, p. 68.
4. R.N. Haszeldine, A.G. Sharpe, Fluorine and its Compounds, Methuen/Wiley, London/New York, 1951.
5. I.G. Ryss, Khimia Ftora i ego Neorganicheskih Soedineniy (Chemistry of Fluorine and its Inorganic Compounds), Goskhimizdat, Moscow, 1956.