1. Marti, P., Schweiz. Baust.-Ind., 1989, vol. 20, no.2, p. 9.
2. Pourbaix, M., Corros. Sci., 1974, vol. 14, no.1, p. 25.
3. Ratinov, V.B. and Ivanov, F.M., Khimiya v stroitel'stve (Chemistry in Building Industry), Moscow: Stroiizdat, 1977.
4. Hoar, T.P., Corros. Sci., 1967, vol. 7, no.6, p. 341.
5. Alvarez, M.G. and Galvele J.R., Corros. Sci., 1984, vol. 24, no.1, p. 27.