KOSMOL, M., S. KOWALEWSKI, A. ŚLIWIŃSKI, and I. WOJCIECHOWSKA. “Investigation of Light Diffraction on an Ultrasonic Wave in Liquid Nematic Crystals”. Archives of Acoustics 16, no. 3-4 (December 31, 1991): 513–530. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/1246.