The following publications are possibly variants of this publication:
- uDirect: A novel approach for pervasive observation of user direction with mobile phonesSeyed Amir Hoseinitabatabaei, Alexander Gluhak, Rahim Tafazolli. percom 2011: 74-83 [doi]
- Opportunistic sensing techniques for the pervasive observation of user direction on mobile phonesSeyed Amir Hoseinitabatabaei. PhD thesis, University of Surrey, Guildford, UK, 2013. [doi]
- Design, Realization, and Evaluation of uDirect-An Approach for Pervasive Observation of User Facing Direction on Mobile PhonesSeyed Amir Hoseinitabatabaei, Alexander Gluhak, Rahim Tafazolli, William C. Headley. tmc, 13(9):1981-1994, 2014. [doi]