NugrahaA. W., SuparnoO., IndrastiN. S., and Hoerudin. “The Properties of Wet Blue Added Crude Enzyme from Rhizopus Oligosporus in the Acid Bating Process”. Tropical Animal Science Journal, Vol. 45, no. 1, Feb. 2022, pp. 104-11, doi:10.5398/tasj.2022.45.1.104.