Tanzeem Choudhury Aaron J. Quigley Thomas Strang Koji Suginuma Location and Context Awareness, 4th International Symposium, LoCA 2009, Tokyo, Japan, May 7-8, 2009, Proceedings 5561 2009 http://dx.doi.org/10.1007/978-3-642-01721-6 978-3-642-01720-9 LoCA Lecture Notes in Computer Science Springer db/conf/loca/loca2009.html