1. Handbook of Textile Fibers: Dyes and Finishes; Garland: New York, 1981; p 144.
2. Handbook of Textile Fibers: Polyurethane Fibers; Textile Book Service, Metuchen, NJ, 1985, p 76.
3. ; Polyurethanes: Chemistry and Technology, Pt. 1 and 2; Interscience: New York, 1962.