Breysse, D., Balayssac, J.-P. and Sbartaï, Z.M. 2021. RILEM TC ISC-239 recommendation on reliable assessment of on-site concrete strength with NDT testing. Academic Journal of Civil Engineering. 38, 2 (Mar. 2021), 60-63. DOI:https://doi.org/10.26168/ajce.38.2.14.