Khoshnoud, Parisa, and Nidal Abu-Zahra. 2015. “Effect of Cenosphere Fly Ash on the Thermal, Mechanical, and Morphological Properties of Rigid PVC Foam Composites”. Journal of Research Updates in Polymer Science 4 (1):1-14. https://doi.org/10.6000/1929-5995.2015.04.01.1.