DEVELOPMENT OF COMPOSITES BASED ON THERMOSETTING POLYMERS (EPOXY, POLYESTER AND VINYLESTER RESINS) WITH CENOSPHERE FILLERS IN DIFFERENT CONCENTRATIONS – 5 WT.%, 10 WT.% AND 15 WT.%. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 4, p. 81–84, 2025. DOI: 10.17770/etr2025vol4.8431. Disponível em: https://archive-journals.rtu.lv/etr/article/view/5249.. Acesso em: 11 mar. 2026.