Vo, T., T. Phung, H. Truong, L. Nguyen, O. Nguyen, and P. Le. “Physical-Chemical and Electrochemical Properties of Sodium Ion Conducting Polymer Electrolyte Using Copolymer Poly(vinylidene Fluoride- Hexafluoropropylene) (PVDF-HFP)/ Polyethylene Oxide (PEO)”. Science and Technology Development Journal, Vol. 22, no. 1, Mar. 2019, pp. 147-5, doi:https://doi.org/10.32508/stdj.v22i1.1230.