Nguyen Van Tuan, Hoang Tuan Nghia, Nguyen Cong Thang, Cu Viet Hung, Keun-Hyeok Yang, and Pham Sy Dong. 2021. “EXPERIMENTAL STUDY TO PRODUCE MANHOLE COVER USING ULTRA-HIGH PERFORMANCE CONCRETE”. GEOMATE Journal 21 (85):91-98. https://geomatejournal.com/geomate/article/view/69.