1. Topography- versus selection-based responding: Comparison of mand acquisition in each modality;Adkins;The Behavior Analyst Today,2001
2. Comparison of PECS and the use of a VOCA: A replication;Beck;Education and Training in Developmental Disabilities,2008
3. Augmentative and alternative communication: Supporting children and adults with complex communication needs;Beukelman,2005
4. Increasing functional communication in non-speaking preschool children: Comparison of PECS and VOCA;Bock;Education and Training in Developmental Disabilities,2005
5. The picture exchange communication system;Bondy;Focus on Autistic Behavior,1994