Simangunsong, D. I., T. H. A. Hutapea, H. W. Lee, J. O. Ahn, and J. Sitompul. “The Effect of Nanocrystalline Cellulose (NCC) Filler on Polylactic Acid (PLA) Nanocomposite Properties”. Journal of Engineering and Technological Sciences, vol. 50, no. 4, Oct. 2018, pp. 578-87, doi:10.5614/j.eng.technol.sci.2018.50.4.9.