Y. Nassif Sabr, D. Husain Khalaf Jarallah, and D. Hassan Issa Abdul Kareem, “Improving the Shear Strength of Lightweight RC Thick Hollow Core Slab Made of Recycled Materials”, IJET, vol. 7, no. 4.20, pp. 403–407, Nov. 2018, doi: 10.14419/ijet.v7i4.20.26143.