@article{alves_brito_barros_sousa_farias filho_2026,  title={<i>In situ</i> Chemical Analysis of Red Rock Art Pigments from Inhuma (Piauí, Brazil) Using pXRF and PCA},  volume={37},  ISSN={0103-5053},  url={https://doi.org/10.21577/0103-5053.20260137},  DOI={10.21577/0103-5053.20260137},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Alves, Tetisuelma L. and Brito, Anna L. B. de and Barros, Wilkins O. de and Sousa, Alek A. C. de and Farias Filho, Benedito B.},  year={2026},  pages={e–20260137} }