Voir la notice de l'article provenant de la source Math-Net.Ru
[1] by В. А. Беляков, А. С. Сонин Optika kholestericheskikh zhidkikh kristallov, Nauka, M., 1982
[2] A. A. Gevorgyan, Uch. zapiski EGU, 1986, no. 3(163), 47–55
[3] A. A. Gevorgyan, Uch. zapiski EGU, 1987, no. 2(165), 65–73
[4] A. A. Gevorgyan, Uch. zapiski EGU, 1988, no. 3(169), 62–69
[5] O. S. Eritsyan, Izv. AN Arm. SSR. Fizika, 19 (1984), 70–73
[6] O. S. Eritsyan, Izv. AN Arm. SSR. Fizika, 11 (1976), 344–350
[7] A. A. Gevorgyan, O. S. Eritsyan, Izv. AN Arm. SSR. Fizika, 19 (1984), 135–142
[8] B. Ya. Zeldovich, N. V. Tabiryan, ZhETF, 82 (1982), 167–176
[9] O. S. Eritsyan, Zh. O. Ninoyan, A. A. Gevorgyan, Uch. zapiski EGU, 1984, no. 3(157), 61–64