Zieliński, J., E. Gurdzińska, B. Osowiecka, T. Brzozowska, and W. Ciesińska. “Utilization of Thermoplastic Polymer Waste in Blends With Petroleum Bitumen Fractions”. Polimery, vol. 55, no. 10, Oct. 2010, pp. 773-81, http://ichp.vot.pl/index.php/p/article/view/1064.