A. Septriana, Azhar, and W. Astuti, “Daur Ulang Refraktori Bekas Kiln dan Fly Ash Batubara dengan Variasi Tekanan Greenbody [Recycling of Used Refractory of Kiln and Coal Fly Ash by Various of Greenbody Presure]”, Metalurgi, vol. 32, no. 3, pp. 97–104, Dec. 2017.