1. ; A History of Chemistry (van Dam, D., English translation); Harvard University Press: Cambridge, 1996;
2. (a) ibid, p. 245;
3. (b) ibid, p. 206;
4. (c) Ideas in Chemistry: A History of Science; Rutgers University Press: New Braunscwick, NJ, 1992, Ch. 13.
5. Chemistry and Engineering News, 29th Issue; November 2004, p. 31.