S. N. Rahmadhia, I. N. Septiani, A. Fitriani, and S. K. Putri, “Characterization of Intelligent Packaging from Chitosan-Cassava Starch with Butterfly Pea Flower Extract and Gambier Catechin as Freshness Sensor”, Trends Sci, vol. 23, no. 4, p. 12075, Dec. 2025.