Sala, Filip A., and Mirosław A. Karpierz. “Numerical Simulation of Beam Propagation in a Layer Filled With Chiral Nematic Liquid Crystals”. Photonics Letters of Poland, vol. 1, no. 4, Dec. 2009, pp. pp. 163-165, doi:10.4302/photon. lett. pl.v1i4.71.