Prociak, A., J. Pielichowski, M. Modesti, F. Simioni, and M. Checchin. “Influence of Different Phosphorus Flame Retardants on Fire Behaviour of Rigid Polyurethane Foams Blown With Pentane”. Polimery, vol. 46, no. 10, Sept. 2022, pp. 692-6, http://ichp.vot.pl/index.php/p/article/view/2122.