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- [1] The effectiveness of the Picture Exchange Communication System (PECS) for children with autism spectrum disorder (ASD): A South African pilot study CHILD LANGUAGE TEACHING & THERAPY, 2010, 26 (01): : 39 - 59
- [8] Effectiveness of a tooth-brushing programme using the picture exchange communication system (PECS) on gingival health of children with autism spectrum disorders European Archives of Paediatric Dentistry, 2020, 21 : 277 - 283