1. C.R. Shipley, US Pat. 3011920, 1961.
2. E.D. O'Ottavio, US Pat. 3532518, 1970; US Pat. 3650913, 1972.
3. R.J. Zeblisky, US Pat. 3682671, 1972.
4. G.A. Krulik and M.N. Jameson, French Pat. 2310-158, 1977.
5. The Catalytic Process in Electroless Plating;Krulik,1976