Here are some links to academic references, articles and books from different groups
AACknowledge – the AAC evidence base – Publications by year
CiteULike AAC Group – List of papers about AAC
Free academic papers taken from the AAC Journal and hosted by Communication Matters
Getting Started with AAC – “Three books have been designed to help families and professionals alike to get started with Augmentative and Alternative Communication (AAC). These have been edited by the Ace Centre, a UK charity providing information, advice and support for individuals who require technology to communicate.”
Focus on leaflets available from Communication Matters for families and carers as well as those interested in AAC