Pratiwi, A. P., Prihandono, T., & Prastowo, S. H. B. (2021). Numerical Solution of Radioactive Core Decay Activity Rate of Actinium Series Using Matrix Algebra Method. Jurnal Penelitian Pendidikan IPA, 7(3), 395–400. https://doi.org/10.29303/jppipa.v7i3.716