1. Polyurethanes Technology;Brains,1969
2. Polyurethane Elastomers;Hepburn,1992
3. Polyurethane, Chemistry, Technology and Applications;Wirpsza,1993
4. Polyurethane Chemistry;Dodge,1999
5. A.G. Bayer, Polyurethane Application Research Department, “Bayer - Polyurethanes,” Leverkusen, Germany. Edition January, 1979.