Hardi, Jaya. “Immobilization of Bromelain from Pineapple Core by Chitosan-Alginate and Its Application in Virgin Coconut Oil Production”. BioNatura Journal: Ibero-American Journal of Biotechnology and Life Sciences, vol. 2, no. 2, June 2025, p. 14, doi:10.70099/BJ/2025.02.02.8.