Freitas, J., Teixeira, A., Sales Dias, M., & Silva, S. (2017). An introduction to silent speech interfaces. Springer. https://doi.org/10.1007/978-3-319-40174-4

Freitas, Joao, Antonio Teixeira, Miguel Sales Dias, and Samuel Silva. An Introduction to Silent Speech Interfaces. Cham: Springer, 2017. https://doi.org/10.1007/978-3-319-40174-4.

Freitas, Joao, et al. An Introduction to Silent Speech Interfaces. Springer, 2017. https://doi.org/10.1007/978-3-319-40174-4.