MeredithR., Torsional Rigidity Modulus, in “The Mechanical Properties of Textile Fibers,” Edited by MeredithR., North-Holland Publishing Co., Amsterdam, 1956, p. 303.
2.
OkabayashiM.YamazakiC.TeradaK.NegishiT., Measurement of Torsional Rigidity of Fibers, Textile Res. J. 46, 429–433 (1976).