Lubis, Julianto. “Pemeriksaan Kuat Tarik Belah Beton Dengan Persentase Substitusi Fly Ash Yang Berbeda”. Engineering and Technology International Journal 6, no. 03 (November 25, 2024): 155–160. Accessed July 29, 2026. https://www.mand-ycmm.org/index.php/eatij/article/view/895.