Kyusung Cho Wonhyoung Kang Jaemin Soh Juho Lee Hyun Seung Yang Ghost Hunter: A Handheld Augmented Reality Game System with Dynamic Environment. 10-15 2007 conf/iwec/2007 ICEC http://dx.doi.org/10.1007/978-3-540-74873-1_2 db/conf/iwec/icec2007.html#ChoKSLY07