Markel Vigo Julio Abascal Rui Lopes Paola Salomoni International Cross-Disciplinary Conference on Web Accessibility, W4A '12, Lyon, France, April 16-17, 2012 ACM W4A 2012 978-1-4503-1019-2 http://dl.acm.org/citation.cfm?id=2207016 db/conf/w4a/w4a2012.html