Moleong, R., F. Fatimah, and J. Kumajas. “The Effect of Papain Enzyme Concentration on Protein Content and Antioxidant Activity of Skipjack Tuna (Katsuwonus Pelamis) Protein Hydrolysate”. Jurnal Beta Kimia, Vol. 6, no. 1, Apr. 2026, pp. 33-39, doi:10.35508/jbk.v6i1.27560.