Gailitis, R. et al. 2021. PLAIN AND PVA FIBRE-REINFORCED GEOPOLYMER COMPACT TENSION SPECIMEN CRITICAL AREA SURFACE COMPOSITION ASSESSMENT. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference. 3, (Jun. 2021), 72–77. DOI:https://doi.org/10.17770/etr2021vol3.6569.