Rui José Elaine M. Huang The International Symposium on Pervasive Displays, PerDis 2012, Porto, Portugal, June 4-5, 2012 ACM PerDis 2012 978-1-4503-1414-5 http://dl.acm.org/citation.cfm?id=2307798 db/conf/perdis/perdis2012.html