@article{cielo_casarin_2008,  title={Sons fricativos surdos},  volume={10},  ISSN={1516-1846},  url={https://doi.org/10.1590/S1516-18462008000300010},  DOI={10.1590/S1516-18462008000300010},  number={3},  journal={Revista CEFAC},  publisher={ABRAMO Associação Brasileira de Motricidade Orofacial},  author={Cielo, Carla Aparecida and Casarin, Maísa Tatiana},  year={2008},  pages={352–358} }