1. K. Tuutti, (CBI), Report Fo 4.82, Stockholm, 1982.
2. M. Collepardi, A. Marcialis, R. Turriziani, Il Cemento 4 (1970) 157–164.
3. L. Tang, L.O. Nilsson, ACI Materials Journal Technical Paper, 1992, pp. 49–53.
4. N. Otsuki, S. Nagataki, K. Nakashita, ACI Materials Journal, Technical paper, 1992, pp. 587–592.
5. M. Collepardi, Proceedings of the International RILEM Workshop, St. Rémy-les-Chevreuse, France, 1995, p. 10.