PAUNESCU, B.-V., L. PAUNESCU, and E. VOLCEANOV. “POROUS FLY ASH-BASED GEOPOLYMER USABLE AS AN UNCONVENTIONAL CONSTRUCTION MATERIAL”. Journal of Engineering Studies and Research, vol. 29, no. 3, Jan. 2024, pp. 57-65, doi:10.29081/jesr.v29i3.006.