Prasetyo, M. R., U. Sarofa, and R. R. “Characteristics of Chitooligosaccharides Hydrolysate from Crab Shell (Portunus Pelagicus) Waste by Chitosanase Hydrolysis”. Food Science and Technology Journal (Foodscitech), May 2022, pp. 85-95, doi:10.25139/fst.v5i1.4364.