1. Kirk-Othmer, ?Encyclopedia of Chemical Technology?, Vol. 2, 3rd ed., (edited by Galen J. Bushey, Anna Klingsberg-and Lorraine Van Nes). John Wiley & Sons, New York (1978) pp. 348?353 and 364?365.
2. M. Windholz, S. Budavari, R. F. Blumetti and E. S. Otterbein, The Merck Index, ?An Encyclopedia of Chemicals, Drugs and Biologicals?, 10th ed., (edited by Martha Windholz), Merck & Co., USA (1983) p. 1050.
3. N. M. Winslow,Trans. Electrochem. Soc. 80 (1941) 121.
4. J. Mizuguchi and S. Matsumoti,Yakugaku Zashi,78 (1985) 129, Chemical Abstract, 52-8794G.
5. E. Jagannathan and P. N. Anantharaman,Trans SAEST 21 (4) (1986) 229.