Şahal, Hakan, and Ercan Aydoğmuş. 2023. “Use of Sunflower Seed Shells As Filler in Polyester Resin and Characterization of Obtained Composite”. International Conference on Engineering, Natural and Social Sciences 1 (April):233-36. https://as-proceeding.com/index.php/icensos/article/view/445.