Hang, P.T.N. and Dung, P.T. 2009. The Propagation of the Electromagnetic Wave in Multilayers Structures Composed from Cholesteric Liquid Crystals under the Influence of the External Electric Field. Communications in Physics. 19, 1 (May 2009), 26–32. DOI:https://doi.org/10.15625/0868-3166/19/1/235.