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2.
Manich, A., de Castellar, D., and Barelia, A., Influence of a Yarn Extractive Nozzle on the Apparent Loss of Twist in Rotor Open-End Acrylic Staple Spun Yarns, Textile Res. J.56, 207-211 (1986).
3.
Thierron, L. , and Hunter, L., Studies on OE Rotor Spun Yarns and Dref III Spun Yarns, SAWTRI Tech. Rep.530, 1983.
4.
UNE 40.002 (Spanish Standard), Medición de la torsión de los hilos.