Tambunan, P. M. . “Karakterisasi Kadar Mineral, Logam Berat Serta Distribusi Ukuran Partikel Limbah Abu Terbang (Fly Ash) Sisa Pembakaran Batu Bara Industri Oleokimia”. Journal of The Indonesian Society of Integrated Chemistry, vol. 14, no. 2, Dec. 2022, pp. 100-8, doi:10.22437/jisic.v14i2.21355.