Abdulhussein, F. K., S. Beddu, F. Nazri, S. Al-Hubboubi, and N. Aljalawi. “Effect of Using Fly Ash and Attapulgite Lightweight Aggregates on Some Properties of Concrete”. Engineering, Technology & Applied Science Research, vol. 14, no. 5, Oct. 2024, pp. 17280-5, doi:10.48084/etasr.8452.