Falcao, E. ., T. Silva, L. Muniz, and E. Rodrigues. “Synthesis and Optical Characterization of Annatto (Bixa Orellana L.)-Doped PVDF Samples: Ultraviolet Optical Absorption Enhancement and Bandgap”. Journal of Composites and Biodegradable Polymers, vol. 14, Aug. 2026, pp. 98-104, doi:10.12974/2311-8717.2026.14.08.