Dahish, Hany A., Abdullah AlSuwaiyan, Ahmad F. Alragi, and Sherif M. ElKholy. 2020. “Reducing Overburden Pressure on Concrete Buried Pipes Utilizing SABIC PolystyreneProductsin Saudi Arabia”. JOURNAL OF ENGINEERING AND COMPUTER SCIENCES 11 (1):1-24. https://jecs.qu.edu.sa/index.php/jec/article/view/2111.