Positioning Techniques for Ubiquitous Ecological Learning. - Hsien-Sheng Hsiao; Kun-Jing Li; Chih-Cheng Lin; Wan-Ti Hong (ICETC, 2009)

Location Based Services for Outdoor Ecological Learning System: Design and Implementation. - Hsien-Sheng Hsiao; Chih-Cheng Lin; Ruei-Ting Feng; Kun-Jing Li (J. Educ. Technol. Soc., 2010)