Hani Adnan, Suraya, Ismail Abdul Rahman, and Lee Yee Loon. 2011. “Performance of Recycled Aggregate Concrete Containing Micronised Biomass Silica”. International Journal of Sustainable Construction Engineering and Technology 1 (2): 1-10. https://penerbit.uthm.edu.my/ojs/index.php/IJSCET/article/view/57.