1. P. Bruins, Polyurethane Technology, Interscience Publishers, New York.
2. P.B. Jacobs and P.C. Yu, 19th Water-Borne, Higher Solids and Powder Coatings Symposium, 1992, p. 363.
3. L. Kahl and M. Bock, 3rd Nurmberg Congress, 1995, paper 7.
4. D. Fiori and R. Dexler, 13th Water-Borne and Higher Solids Coatings Symposium, 1986, p. 186.
5. D.E. Fiori and R.J. Quinn, US Patent 5,466,745 (to Cytec Technology Corp.), Nov. 11, 1995.