I. B. Hasibuan, R. Ridwanto, A. S. Daulay, and A. F. Pulungan, “Isolation of Chitosan from Atrina pectinata Shells as an Edible Coating for Red Bell Peppers (Capsicum annuum L.)”, JPS, vol. 9, no. 3, pp. 3117–3126, Sep. 2026.