Kwaśny, M., U. A. Laudyn, P. Jung, and M. A. Karpierz. “Possibility of Discrete Beam Propagation in Chiral Nematic Liquid Crystals”. Photonics Letters of Poland, vol. 1, no. 4, Dec. 2009, pp. pp. 160-162, doi:10.4302/photon. lett. pl.v1i4.77.