Denche Gil, Sandra, Natalia Morán Pallero, and Elena Felipe Castaño. “Intervention Using an Alternative-Augmentative Communication System in Intellectual and Developmental Disabilities: A Single Case Design”. International Journal of Developmental and Educational Psychology. Revista INFAD de Psicología. 2, no. 1 (July 12, 2023): 241–250. Accessed May 20, 2024. https://revista.infad.eu/index.php/IJODAEP/article/view/2513.