1. R. Tirpak and P. Markusch, Proc. 12th Waterborne, Higher Solids, and Powder Coatings Symp., 1985, p. 159.
2. R.G. Coogan and R.V. Boghossian, U.S. Patent 5,169,895.
3. R.G. Coogan and R.V. Boghossian, U.S. Patent 5,043,381.
4. A.T. Chen, E.K. Lawrence, R.T. Wojcik and J.M. O'Connor, Proc. 23rd Waterborne Higher Solids, and Powder Coatings Symp., 1996, p. 103.