Breysse, D., X. Romao, M. Alwash, J.-P. Balayssac, and M. Sbartai Zoubir. “How Many Cores Are Needed to Assess on Site Concrete Strength With Non-Destructive Techniques ?”. Academic Journal of Civil Engineering, Vol. 36, no. 1, Apr. 2019, pp. 215-9, doi:10.26168/ajce.36.1.52.