Kai Kuikkaniemi Marko Turpeinen Antti Salovaara Timo Saari Janne Vuorenmaa Toolkit for user-created augmented reality games. 6 2006 MUM http://doi.acm.org/10.1145/1186655.1186661 conf/mum/2006 db/conf/mum/mum2006.html#KuikkaniemiTSSV06