Watt, Alexander (1886). “XXIX. Electro-Metallurgy”. Electro-deposition. A practical treatise on the electrolysis of gold, silver, copper, nickel, and other metals, and alloys. London: Crosby Lockwood and Son. p. 395. OCLC3398104. "An early investigation of this subject was made by Maximillian, Duke of Leuchtenberg, in the year 1847", Reproduced by Read Books (2008), ISBN9781443766838
Watt, Alexander (1886). “XXIX. Electro-Metallurgy”. Electro-deposition. A practical treatise on the electrolysis of gold, silver, copper, nickel, and other metals, and alloys. London: Crosby Lockwood and Son. p. 395. OCLC3398104. "An early investigation of this subject was made by Maximillian, Duke of Leuchtenberg, in the year 1847", Reproduced by Read Books (2008), ISBN9781443766838