Kędzierski, M., P. Jankowski, G. Jaworska, and A. Niska. “Graphite Oxide As an Intumescent Flame Retardant for Polystyrene”. Polimery, vol. 57, no. 5, May 2012, pp. 347-53, https://ichp.vot.pl/index.php/p/article/view/833.