Michalik, Mirosław. “Linguistics of Augmentative and Alternative Communication in the Process of Diagnosis of Speech Inability and Speech Non-Occurrence”. Logopaedica Lodziensia, no. 4 (November 26, 2020): 131–139. Accessed December 23, 2025. https://czasopisma.uni.lodz.pl/logopedica/article/view/8705.