Matthias Kracht

发表

GPS tracking data of individuals as substitute for travel diaries. Experience from a pilot project in Berlin Germany.

Matthias Kracht, 2005 .

Tracking and Interviewing Individuals with GPS and GSM Technology on Mobile Electronic Devices

Matthias Kracht, 2004 .

Using Combined GPS and GSM Tracking Information for Interactive Electronic Questionnaires

Matthias Kracht, 2006 .