@article{franca_simpson_schuette_2013,  title={Effects of caffeine on vocal acoustic and aerodynamic measures of adult females},  volume={25},  ISSN={2317-1782},  url={https://www.scielo.br/j/codas/a/mSPyp9SXg9NmwHJfmYS39Vy/},  number={3},  journal={CoDAS},  publisher={Sociedade Brasileira de Fonoaudiologia},  author={Franca, Maria Claudia and Simpson, Kenneth Oliver and Schuette, Allison},  year={2013},  pages={250–255} }