1. C.H.J. Hare, Prot. Coat. Linings, 11 (1994) 71.
2. R.H. Roesler and P.R.J. Hergenrother, Prot. Coat. Linings, 13 (1996) 83.
3. (a) W. Kubitza, H. Gruber and J. Probst, US Patent No. 5,075,370 (1991).
4. (b) B. Mayer, U. Meisenburg and E. Niehus, Australian Patent Appl. 9,470,010A (1995).
5. (a) L. Kahl and M. Bock, Proceedings of 3rd Nurnberg Congress, March, 1995.