Kamal Ghamry Metwally, Ahmed Gamal Hassan, Ahmed Abdelmoamen Khalil, and Ibrahim Ramadan. 2020. “INVESTIGATION OF USING A BITUMINOUS SUB-BALLAST LAYER TO ENHANCE THE STRUCTURAL BEHAVIOR OF HIGHSPEED BALLASTED TRACKS”. GEOMATE Journal 19 (75):122-32. https://geomatejournal.com/geomate/article/view/1723.