Chen, C., Q. Li, L.F. Shen, H. Zhao, and J.P. Zhai. 2011. “Potential for Manufacturing Unfired-Bricks Using Circulating Fluidized Bed Combustion Fly Ash”. Asian Journal of Chemistry 23 (8):3449-53. https://asianpubs.org/index.php/ajchem/article/view/10638.