R. P. Y. Luther, I. Y. Muhammad, N. Usman, A. S. Abdulazeez, A. M. Kolawole, and S. M. Olawale, “EXPERIMENTAL INVESTIGATION OF THE STRENGTH PROPERTIES OF CONCRETE PRODUCED WITH VOLCANIC ASH AND METAKAOLIN AS PARTIAL REPLACEMENT OF CEMENT”, FJS, vol. 9, no. 6, pp. 90 - 97, Jun. 2025.