^ The International Bureau For The Standardisation of Man-Made Fibres (BISFA), Terminology of man-made fibres (PDF), 2006, p. 46 (archiviato dall'url originale il 25 luglio 2011).
^ David Himmelfarb, The Technology of Cordage Fibres and Rope, Londra, Leonard Hill, 1957, p. 116.