Nguyen, V. M., Nguyen Van, M., Nguyen, V. A. “Optimization of the Engineering Properties of Cement Concrete Containing Gravel and Waste Rock Using Dense Packing and Response Surface Methodology”, Periodica Polytechnica Civil Engineering, 67(4), pp. 1246–1263, 2023. https://doi.org/10.3311/PPci.21908