1. M.H. Grant, Kirk-Othmer: Encyclopedia of Chemical Technology, vol. 19, fourth ed., John Wiley & Sons, 1996, pp. 258–262.
2. R.T. Moorison, R.N. Boyd, Organic Chemistry, third ed., Allyn & Bacon Inc., 1973 (Chapter 27).
3. H. Bahrmann, W. Greb, P. Heymanns, P. Lappe, T. Muller, J. Szameitat, E. Wiebus, USP 5 463 147 (1995).
4. P.N. Rylander, Catalytic Hydrogenation in Organic Synthesis, Academic Press, New York, 1979, pp. 72.