Koleva, Milena, Venceslav Vassilev, and Gergo Vassilev. 2008. “Polymer Composites Containing Waste Dust from Power Production II. Strength Characteristics of Composites Based on UPR/HIPS Polymer System”. Macedonian Journal of Chemistry and Chemical Engineering 27 (1):47–52. https://doi.org/10.20450/mjcce.2008.246.