Budaszewski, Daniel, and Andrzej W Domański. “Birefringence Measurement of Polymer Photonic Crystal Fibers Infiltrated With Liquid Crystals by Depolarization of Light Effect”. Photonics Letters of Poland, vol. 6, no. 4, Dec. 2014, pp. pp. 148-150, doi:10.4302/photon. lett. pl.v6i4.532.