Widiarti, L., S. Dur, and A. R. A. Siregar. “The Effect of Glycerol Concentration on Biodegradable Plastic Made from Cassava Peel Starch”. Journal of Pharmaceutical and Sciences, vol. 8, no. 4, Dec. 2025, pp. 3051-9, doi:10.36490/journal-jps.com.v8i4.1072.