1. ISO 2076:1989.
2. Generic names and definitions of manufactured fibers US Code of Federal Regulations Title 16 Section 303. 7 (1 Jan 1987)161.
3. ASTM Standard D 123–93 Annex Al generic names and definitions of man–made fibers (Philadelphia: ASTM) 45.
4. DUP BP 871 578 (1961).
5. DUP BP 871 579 (1961). 6 DUP BP 871 580 (1961).