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.%. ETR [Internet]. 2025 Jun. 8 [cited 2026 Mar. 11];4:81-4. Available from: https://archive-journals.rtu.lv/etr/article/view/5249