1. D. Brewster: Edinb. Trans. 1846, part II, p. 3; Fogg. Ann. 73, 531, 1848; Ann. chim. et phys. (3) 38, 376, 1853.
2. Stokes: Phil. Trans. 1852, part II, p. 403; Pogg. Ann. 87, 480, 1852; 91, 158, 1854; Ergänzungsbd. 4, 177, 1854; 96, 522, 1855; 123, 30, 472, 1864.
3. H. Lehmann: Verh. d. D. Phys. Ges. 12, 890, 1910; 13, 1101, 1911.
4. P. Lewis: Phys. Ztschr. 3, 498, 1902.
5. Lommel: Pogg. Ann. 143, 26, 1871; 159, 514, 1876; 160, 75, 1877; Wied. Ann. 3, 113, 251, 1878; 8, 244, 634, 1879; 10, 640, 1880; 19, 356, 1883; 21, 422, 1884.