1. W. Canning, The Canning Handbook on Electroplating, 20th Edition (1978), pp. 425–429.
2. L.F. Spencer, Metal Finishing, Oct. and Nov. (1974).
3. R.M Burns and W.W. Bradley, Protective Coatings for Metals, Reinhold (1947), pp. 229–230.
4. A. Brenner and G.E. Riddell, Proc. Am. Electroplaters’ Soc. (1947), p. 156.
5. C.H. Minjer and A. Brenner, Plating, 44 (1975), p. 1297.