“Determination of Iron (Fe) and Calcium (Ca) in NIST SRM 1566b (Oyster Tissue) Using Flame Atomic Absorption Spectrometry (F-AAS) by Standard Addition Method”. Jurnal Kimia Valensi 2, no. 2 (May 1, 2011). Accessed October 28, 2025. https://journal.uinjkt.ac.id/valensi/article/view/205.