Amin, M., D. C. Birawidha, K. Isnugroho, Y. Hendronursito, S. Sumardi, S. Ario, S. Syafriadi, and M. Al-Muttaqii. “THE INFLUENCE OF BASALT MINERALS AS CEMENT SUBSTITUTION MATERIALS IN MORTAR”. Acta Polytechnica, vol. 59, no. 6, Dec. 2019, pp. 536-42, doi:10.14311/AP.2019.59.0536.