N. Bheel, A. W. Abro, I. A. Shar, A. .A. Dayo, S. Shaikh, and Z. H. Shaikh, “Use of Rice Husk Ash as Cementitious Material in Concrete”, Eng. Technol. Appl. Sci. Res., vol. 9, no. 3, pp. 4209–4212, Jun. 2019.