UbiComp 2012 (14th ACM International Conference on Ubiquitous Computing), page. 236 - 239, 2012-09-06
ACE 2009 (International Conference on Advances in Computer Entertainment Technology), page. 345 - 348, 2009-10-30
Ubicomp '11: The 2011 ACM Conference on Ubiquitous Computing, page. 555 - 556, 2011-09-18