W. Singsang, J. Suetrong, T. Choedsanthia, N. L.- ong Srakaew, S. Jantrasee, and N. . Prasoetsopha, “Properties of Biodegradable Poly(butylene succinate) Filled with Activated Carbon Synthesized from Waste Coffee Grounds”, J. Mater. Sci. Appl. Energy., vol. 10, no. 3, pp. 87–95, Aug. 2021.