@article{souza_simões-zenari_nemr_2026,  title={Spectral and vocal tract diagram differences in spoken and sung vowel production by soprano singers},  volume={28},  ISSN={1516-1846},  url={https://doi.org/10.1590/1982-0216/20262849025},  DOI={10.1590/1982-0216/20262849025},  number={4},  journal={Revista CEFAC},  publisher={ABRAMO Associação Brasileira de Motricidade Orofacial},  author={Souza, Glaucia Verena Sampaio de and Simões-Zenari, Marcia and Nemr, Katia},  year={2026},  pages={e9025} }