Chilińska-PułkowskaA. and Kaczorowska-BrayK. 2020. The pre-oral phase of swallowing and its disorders among people with severe intellectual disability. Logopedia Silesiana. 9 (Dec. 2020), 1-27. DOI:https://doi.org/10.31261/LOGOPEDIASILESIANA.2020.09.15.