Husseina, Hassan Hadi, et al. “Study the Coupling Agents of the Common Effect of Adding High Reactive Mineral Admixture Meta-Kaolin and Super-Plasticizer on the Mechanical Properties of Lightweight Concrete Prepared by LECA Aggregate”. Journal of Al-Qadisiyah for Computer Science and Mathematics, vol. 14, no. 2, July 2022, pp. Math Page 71-87, doi:10.29304/jqcm.2022.14.2.971.