Raheem, Akeem Ayinde, and Olumide A Adenuga. “Wood Ash from Bread Bakery As Partial Replacement for Cement in Concrete”. International Journal of Sustainable Construction Engineering and Technology 4, no. 1 (April 27, 2013): 75-81. Accessed October 21, 2019. https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/547.