Purwanto, H., and U. C. Wardani. “PENGARUH PENAMBAHAN SERBUK BESI TERHADAP KUAT TEKAN BETON MUTU K225”. Jurnal Deformasi, vol. 5, no. 2, Dec. 2020, pp. 103-12, doi:10.31851/deformasi.v5i2.5039.