1. O.R. Kirk, F.T. Othmer, Encyclopedia of Chemical Technology, vol. 19, Wiley, New York, 1982.
2. Ulmanns Encyklopaedie der Technishen Chemie, Verlag Chemie, Weinheim, 1984.
3. L.W. Fine, H. Beall, Chemistry for Engineers and Scientists, Saunders, Philadelphia, PA, 1990.
4. C.R. Weast (Ed.), CRC Handbook of Chemistry and Physics, CRC Press, Boca Raton, OH, 1976.