Design and Implementation of ZigBee-Ontology-Based Exhibit Guidance and Recommendation System. - Hung-Yu Chien; Shyr-Kuen Chen; Ching-Yang Lin; Jia-Ling Yan; Wei-Chen Liao; Huan-Yi Chu; Kuan-Ju Chen; Bo-Fan Lai; Yi-Ting Chen (International Journal of Distributed Sensor Networks, 2013)