Davis, L.E.; Chambers, J.: 'Optical scattering in a nematic liquid crystal induced by acoustic surface waves', Electronics Letters, 1971, 7, (11), p. 287-287, DOI: 10.1049/el:19710198
IET Digital Library, https://digital-library.theiet.org/;jsessionid=yqtvsplv8pk0.x-iet-live-01content/journals/10.1049/el_19710198