Providing Location Estimation within a Metropolitan Area Based on a Mobile Phone Network. - Joseph Kee-Yin Ng; Stephen Ka Chun Chan; Kenny Ka Ho Kan (DEXA Workshops, 2002)

A Dual-Channel Location Estimation System for Providing Location Services Based on the GPS and GSM Networks. - Kenny Ka Ho Kan; Stephen Ka Chun Chan; Joseph Kee-Yin Ng (AINA, 2003)

A Dual-Channel System for Providing Location Estimation in Mobile Computing. - Stephen Ka Chun Chan; Kenny Ka Ho Kan; Joseph Kee-Yin Ng (J. Interconnect. Networks, 2003)