1. B. Cina and B. Ranish, in ?Aluminum Industrial Products, Pittsburg Chapter, Pittsburg? (American Society for Metals, Metals Park, Ohio, 1974).
2. W. Wallace, J. j. Beddoes and M. c. Malherbe, Canad. Aerotech. Space J. 27 (1981) 222.
3. M. v. Hyatt, Corrosion NACE 26 (1970) 487.
4. Idem, ibid. 27 (1971) 49.