Whittaker, E. T. (Edmund T. (1910).Chapter III, Galvanism, from Galvani to Ohm. A history of the theories of aether and electricity : from the age of Descartes to the close of the nineteenth century (67–71). London ; New York : Longmans, Green [etc., etc.]. Vaadatud 11.06.2014: http://archive.org/details/historyoftheorie00whitrich