1. V. I. Lainer and N. T. Kudryavtsev, Fundamentals of Electroplating [in Russian], Metallurgizdat, 1953.
2. V. V. Mikhailov, Uspekhi khimii, 20, 191, 1950.
3. Yu. N. Petrov, Tr. Tadzh. s. -kh. in-ta, 2, 3, 1958.
4. H. Leidheiser, Trans. Inst. Met. Finishing, 31, 207, 1954.
5. British patent no. 900 554.