Vy, N., and L. Duy. “The The Research to Improve the Mechanical Properties and the Water Barrier Properties of Polyvinyl Ancol Film by Graphen Oxide”. VNUHCM Journal of Advanced Research in Natural Sciences, Vol. 4, no. 2, June 2020, pp. 421-9, doi:https://doi.org/10.32508/stdjns.v4i2.601.