NANSU, W., P. CHAIWUT, S. ROSS, G. ROSS, N. SUPHROM, and S. MAHASARANON. ā€œDevelopments of Biodegradable Polymer Based on Polylactic Acid (PLA) With Natural Color Extracts for Packaging Film Applicationsā€. Journal of Metals, Materials and Minerals, vol. 31, no. 3, Sept. 2021, pp. 127-33, doi:10.55713/jmmm.v31i3.1147.