1. W. E. Weber,Abh. Leibnizens Ges., Leip. 316 (1846);
2. Ann. der Phys. 73, 229 (1848);
3. Wilhelm Weber's Werke, Vols. 1?6 (Julius Springer, Berlin, 1893).
4. G. T. Fechner,Ann. der Phys. 64, 337 (1845).
5. E. Whittaker,A History of the Theories of Aether and Electricity (Thomas Nelson, London, 1951).