T.  Ranganathan, Gowd, E. B., Ramesh, C., and Kumar, A., ?Main chain thermotropic liquid crystalline polyurethanes containing biphenyl mesogens based on novel AB-type self-polycondensation route: FT-IR and XRD studies?, Journal of Polymer Science Part A-Polymer Chemistry, vol. 43, no. 9, pp. 1903-1912, 2005.