ODUNFAS, O., and H. ODELADE. “INVESTIGATION OF SOFTWOOD ASH,HARD WOOD ASH AND RICE HUSK ASH AS A PARTIAL REPLACEMENT OF ORDINARY PORTLAND CEMENT IN CONCRETE”. LAUTECH Journal of Engineering and Technology, Vol. 10, no. 2, Aug. 2016, pp. 99-05, https://laujet.com/index.php/laujet/article/view/48.