Breysse, Denys, Jean-Paul Balayssac, and Zoubir Mehdi Sbartaï. “RILEM TC ISC-239 Recommendation on Reliable Assessment of On-Site Concrete Strength With NDT Testing.”. Academic Journal of Civil Engineering 38, no. 2 (March 10, 2021): 60-63. Accessed April 25, 2024. https://journal.augc.asso.fr/index.php/ajce/article/view/2363.