Kitzerow, Heinz-Siegfried, et al. “Effect of Chirality on Liquid Crystals in Capillary Tubes with Parallel and Perpendicular Anchoring.”10.1103/physreve.54.568__Physical Review E, vol. 54, no. 1, American Physical Society (APS), 1996, pp. 568–75, doi:10.1103/physreve.54.568.

Xu, F., et al. “Director Configurations of Nematic-Liquid-Crystal Droplets: Negative Dielectric Anisotropy and Parallel Surface Anchoring.”10.1103/physreve.49.3061__Physical Review E, vol. 49, no. 4, American Physical Society (APS), 1994, pp. 3061–68, doi:10.1103/physreve.49.3061.