1. G. Ebersbach, R. Mey, and G. Uhlich:Die Technik, 1969, vol. 24, pp. 460–64.
2. J. G. Sauer:Met. Progr., 1974, vol. 105, pp. 80–82.
3. H. Kunst und O. Schaaber:VDI-Z, 1965, vol. 107, pp. 49–54.
4. L. S. Lyakhovich and L. G. Voroshnin:Protective Coatings on Metals, vol. 1, p. 128, C/b Consultant Bureau, New York-London, 1969.
5. T. Arai, M. Mizutani, and N. Komatsu:J. Jpn. Inst. Met., 1975, vol. 39, pp. 247–55.