Pang, Xiu-Yan, Ming-Wei Duan, Yu Tian, and Meng Zhai. 2013. “Preparation of Expandable Graphite With Phosphoric Acid As Ancillary Intercalation Reagent and Its Antiflame Property for Linear Low Density Polyethylene”. Asian Journal of Chemistry 25 (10):5390-94. https://doi.org/10.14233/ajchem.2013.14373.